Relevant bibliographies by topics / Hole dynamics

Academic literature on the topic 'Hole dynamics'

Author: Grafiati
Published: 7 July 2024
Last updated: 7 July 2024

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Journal articles on the topic "Hole dynamics":

1

Hu, Xinyu, Yingjie Wei, Cong Wang, Guilin Wang, and Yulin Wang. "Cavity dynamics of the projectile passing through the ice hole." Journal of Applied Physics 133, no. 11 (March 21, 2023): 114702. http://dx.doi.org/10.1063/5.0142204.

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It is of great significance to explore the ocean environment and strategic deployment under the polar ice layer. In this paper, the evolution laws of the water entry cavity of projectiles passing through ice holes with different shapes and sizes are studied, and the motion states of projectiles passing through holes are described. The case of zero-gap contact motion between a projectile and a hole is considered. The results show that the initial resistance drag of the projectile passing through the circular ice hole is the largest in the case of zero-gap contact, and the cavity collapse is serious, while almost no cavity appears at the shoulder of the projectile when passing through the square hole. The intersection of splash crowns is formed at the square and triangular ice holes as the hole size increases, a diffused cavity is formed at the bottom of the hole edge, and the formation of the jet appears multiple times at each stage. Some unique vortices appear near the hole when the projectile passes through the hole. The variations of force and velocity of the projectile passing through the triangular hole are stable, but the velocity drop is the largest.
2

Eliasson, B., and P. K. Shukla. "The dynamics of electron and ion holes in a collisionless plasma." Nonlinear Processes in Geophysics 12, no. 2 (February 11, 2005): 269–89. http://dx.doi.org/10.5194/npg-12-269-2005.

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Abstract. We present a review of recent analytical and numerical studies of the dynamics of electron and ion holes in a collisionless plasma. The new results are based on the class of analytic solutions which were found by Schamel more than three decades ago, and which here work as initial conditions to numerical simulations of the dynamics of ion and electron holes and their interaction with radiation and the background plasma. Our analytic and numerical studies reveal that ion holes in an electron-ion plasma can trap Langmuir waves, due the local electron density depletion associated with the negative ion hole potential. Since the scale-length of the ion holes are on a relatively small Debye scale, the trapped Langmuir waves are Landau damped. We also find that colliding ion holes accelerate electron streams by the negative ion hole potentials, and that these streams of electrons excite Langmuir waves due to a streaming instability. In our Vlasov simulation of two colliding ion holes, the holes survive the collision and after the collision, the electron distribution becomes flat-topped between the two ion holes due to the ion hole potentials which work as potential barriers for low-energy electrons. Our study of the dynamics between electron holes and the ion background reveals that standing electron holes can be accelerated by the self-created ion cavity owing to the positive electron hole potential. Vlasov simulations show that electron holes are repelled by ion density minima and attracted by ion density maxima. We also present an extension of Schamel's theory to relativistically hot plasmas, where the relativistic mass increase of the accelerated electrons have a dramatic effect on the electron hole, with an increase in the electron hole potential and in the width of the electron hole. A study of the interaction between electromagnetic waves with relativistic electron holes shows that electromagnetic waves can be both linearly and nonlinearly trapped in the electron hole, which widens further due to the relativistic mass increase and ponderomotive force in the oscillating electromagnetic field. The results of our simulations could be helpful to understand the nonlinear dynamics of electron and ion holes in space and laboratory plasmas.
3

Antil, Pearl, and Amita Malik. "Hole Detection for Quantifying Connectivity in Wireless Sensor Networks: A Survey." Journal of Computer Networks and Communications 2014 (2014): 1–11. http://dx.doi.org/10.1155/2014/969501.

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Owing to random deployment, environmental factors, dynamic topology, and external attacks, emergence of holes in wireless sensor networks is inescapable. Hole is an area in sensor network around which sensors cease to sense or communicate due to drainage of battery or any fault, either temporary or permanent. Holes impair sensing and communication functions of network; thus their identification is a major concern. This paper discusses different types of holes and significance of hole detection in wireless sensor networks. Coverage hole detection schemes have been classified into three categories based on the type of information used by algorithms, computation model, and network dynamics for better understanding. Then, relative strengths and shortcomings of some of the existing coverage hole detection algorithms are discussed. The paper is concluded by highlighting various future research directions.
4

Khan, Muhammad Atif, Farhad Ali, Nahid Fatima, and Mohamed Abd El-Moneam. "Particles Dynamics in Schwarzschild like Black Hole with Time Contracting Horizon." Axioms 12, no. 1 (December 27, 2022): 34. http://dx.doi.org/10.3390/axioms12010034.

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The black holes radiate their mass and energy in the form of gravitational waves and Hawking-radiation, which lead to a decrease in the mass and energy of the black holes. During the formation of gravitational waves and Hawking radiation, the mass and energy of black holes reduce continuously with the passage of time t. For this reason the metric tensor of the black hole should depends on time t. In this work, a time-dependent term is introduced in the horizon of black hole without losing its symmetry structure by using the approximate Noether symmetry equation. The time-dependent term affects the effective potential, effective force, and all the dynamic features of the black hole. They are discussed for neutral and charged particles. Profiles of the escape velocity of colliding particles are also taken into consideration. Lyapunov exponent is used to check the stability of the orbits of the black hole. Hawking temperature, Bekenstein entropy, Komar energy, and specific energy at horizon of the black hole are discussed in this scenario.
5

Hutchinson, I. H. "Ion hole equilibrium and dynamics in one dimension." Physics of Plasmas 30, no. 3 (March 2023): 032107. http://dx.doi.org/10.1063/5.0142790.

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Electrostatic solitary waves with negative potential (ion holes) are analyzed theoretically using a generalization of the treatment recently developed for slow electron holes. It is shown that an often-cited criterion for their existence is mistaken, and they can, in fact, exist for a wide range of ion to electron temperature ratios. Shifts of the hole velocity vh relative to the ion distributions systematically decrease the permitted hole depths, which become extremely small by [Formula: see text]. Ion holes are usually unstably accelerated by electron reflection forces which are calculated numerically and analytically for the resulting asymmetric potential structure. The timescale of this acceleration is proportional to the ion plasma period and generally longer than the ion bounce time in the potential well. Thus, ion holes behave like approximately rigid entities and even when unstable can survive much longer than the typical transit time of a satellite, so as to be observable.
6

Xu, J. H., C. S. Ting, and T. K. Lee. "Hole dynamics and effective hole-hole interaction in a quantum antiferromagnet." Physical Review B 43, no. 10 (April 1, 1991): 8733–36. http://dx.doi.org/10.1103/physrevb.43.8733.

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7

Zhang, Baocheng. "Thermodynamics of Acoustic Black Holes in Two Dimensions." Advances in High Energy Physics 2016 (2016): 1–8. http://dx.doi.org/10.1155/2016/5710625.

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It is well-known that the thermal Hawking-like radiation can be emitted from the acoustic horizon, but the thermodynamic-like understanding for acoustic black holes was rarely made. In this paper, we will show that the kinematic connection can lead to the dynamic connection at the horizon between the fluid and gravitational models in two dimensions, which implies that there exists the thermodynamic-like description for acoustic black holes. Then, we discuss the first law of thermodynamics for the acoustic black hole via an intriguing connection between the gravitational-like dynamics of the acoustic horizon and thermodynamics. We obtain a universal form for the entropy of acoustic black holes, which has an interpretation similar to the entropic gravity. We also discuss the specific heat and find that the derivative of the velocity of background fluid can be regarded as a novel acoustic analogue of the two-dimensional dilaton potential, which interprets why the two-dimensional fluid dynamics can be connected to the gravitational dynamics but it is difficult for four-dimensional case. In particular, when a constraint is added for the fluid, the analogue of a Schwarzschild black hole can be realized.
8

Corman, Maxence, William E. East, and Justin L. Ripley. "Evolution of black holes through a nonsingular cosmological bounce." Journal of Cosmology and Astroparticle Physics 2022, no. 09 (September 1, 2022): 063. http://dx.doi.org/10.1088/1475-7516/2022/09/063.

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Abstract We study the classical dynamics of black holes during a nonsingular cosmological bounce. Taking a simple model of a nonsingular bouncing cosmology driven by the combination of a ghost and ordinary scalar field, we use nonlinear evolutions of the Einstein equations to follow rotating and non-rotating black holes of different sizes through the bounce. The violation of the null energy condition allows for a shrinking black hole event horizon and we find that for sufficiently large black holes (relative to the minimum Hubble radius) the black hole apparent horizon can disappear during the contraction phase. Despite this, we show that most of the local cosmological evolution remains largely unaffected by the presence of the black hole. We find that, independently of the black hole's initial mass, the black hole's event horizon persists throughout the bounce, and the late time dynamics consists of an expanding universe with a black hole of mass comparable to its initial value.
9

Rayimbaev, Javlon, Nozima Juraeva, Malika Khudoyberdiyeva, Ahmadjon Abdujabbarov, and Mardon Abdullaev. "Quasiperiodic Oscillations and Dynamics of Test Particles around Regular-Kiselev Black Holes." Galaxies 11, no. 6 (November 16, 2023): 113. http://dx.doi.org/10.3390/galaxies11060113.

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Testing gravity theories combining (massive and massless) scalar & electrodynamic fields become the most important issue in relativistic astrophysics using data from, black hole observations. In the present work, we first show a spherically symmetric black hole solution in general relativity coupling to generic-type nonlinear electrodynamics (NED) together with the quintessential field. We also obtain possible values for the parameters of the quintessential field and NED charge in the black hole environment for different values of degree of nonlinearity. Also, event horizon properties and scalar invariants of the black hole spacetime are studied. We investigate the equatorial motion of test particles around the regular-Kiselev black holes and study the combined effects of quintessential field and the NED charge of the black hole on particle angular momentum together with its energy at their circular orbits as well as their innermost circular stable orbits (ISCOs) and compared the obtained results with Reissner-Nordström black hole (RN BH) case. Moreover, we study particle oscillations along the orbits above than ISCO and applications to quasiperiodic oscillations (QPOs) where we obtain constrain values for the quintessential parameter and black hole mass charge parameters using observational QPO data from microquasars.
10

AKHMEDOV, E. T. "BLACK HOLE THERMODYNAMICS FROM THE POINT OF VIEW OF SUPERSTRING THEORY." International Journal of Modern Physics A 15, no. 01 (January 10, 2000): 1–44. http://dx.doi.org/10.1142/s0217751x00000021.

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In this review we try to give a pedagogical introduction to the recent progress in the resolution of old problems of black hole thermodynamics within superstring theory. We start with a brief description of classical black hole dynamics. Then, follow with the consideration of general properties of supersymmetric black holes. We conclude with the review of the statistical explanation of the black hole entropy and string theory description of the black hole evaporation.
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Journal articles Dissertations / Theses Books

Dissertations / Theses on the topic "Hole dynamics":

1

Chung, Hyeyoun. "Exploring Black Hole Dynamics." Thesis, Harvard University, 2014. http://nrs.harvard.edu/urn-3:HUL.InstRepos:14226081.

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This thesis explores the evolution of different types of black holes, and the ways in which black hole dynamics can be used to answer questions about other physical systems. We first investigate the differences in observable gravitational effects between a four-dimensional Randall-Sundrum (RS) braneworld universe compared to a universe without the extra dimension, by considering a black hole solution to the braneworld model that is localized on the brane. When the brane has a negative cosmological constant, then for a certain range of parameters for the black hole, the intersection of the black hole with the brane approximates a Banados-Teitelboim-Zanelli (BTZ) black hole on the brane with corrections that fall off exponentially outside the horizon. We compute the quasinormal modes of the braneworld black hole, and compare them to the known quasinormal modes of the three-dimensional BTZ black hole. We find that there are two distinct regions for the braneworld black hole solutions that are reflected in the dependence of the quasinormal modes on the black hole mass. The imaginary parts of the quasinormal modes display phenomenological similarities to the quasinormal modes of the three-dimensional BTZ black hole, indicating that nonlinear gravitational effects may not be enough to distinguish between a lower-dimensional theory and a theory derived from a higher-dimensional braneworld. Secondly, we consider the evolution of non-extremal black holes in N=4, d=2 supergravity, and investigate how such black holes might evolve over time if perturbed away from extremality. We study this problem in the probe limit by finding tunneling amplitudes for a Dirac field in a single-centered background, which gives the decay rates for the emission of charged probe black holes from the central black hole. We find that there is no minimum to the potential for the probe particles at a finite distance from the central black hole, so any probes that are emitted escape to infinity. If the central black hole is BPS in the extremal limit, then the potential is flat and so there is no barrier to the emission of probes. If the central black hole is non-BPS in the extremal limit, then there is a barrier to emission and we compute the decay rate, which depends both on the charge of the central black hole and the charges of the emitted black holes. Finally, we consider the possibility that an extremal black hole, the end-point of the evolution of a non-extremal black hole through evaporation, may itself split into a multi-centered black hole solution through quantum tunneling, via a gravitational instanton analogous to the instanton for the symmetric double well in elementary quantum mechanics. We find a gravitational instanton that connects two vacuum states: one state corresponding to a single-centered extremal Reissner-Nordstrom (ERN) black hole configuration, and another state corresponding to a multi-centered ERN configuration. We evaluate the Euclidean action for this instanton and find that the amplitude for the tunneling process is equal to half the difference in entropy between the initial and final configurations.
2

Vaziri, Goudarzi Hamed. "Hole Dynamics in Films." Electronic Thesis or Diss., Sorbonne université, 2023. http://www.theses.fr/2023SORUS640.

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L'éclatement du film océanique est un phénomène où un film liquide mince, représentant le chapeau de la bulle, éclate à la surface de l'océan, produisant des gouttelettes de film. Ce phénomène est crucial dans les échanges océan-atmosphère, en particulier dans le transfert de chaleur, de masse et de quantité de mouvement entre l'océan et l'atmosphère. L'éclatement du film implique une série de dynamiques complexes, telles que le drainage, la perforation, la rétraction du film et la désintégration en gouttelettes. La cicatrisation des trous (c’est-à-dire lorsqu’un trou est trop petit et se referme après sa nucléation) est un paramètre essentiel pouvant influencer la dynamique de l'éclatement du film, en particulier l'épaisseur du film lors de l'éclatement et, par conséquent, le budget liquide pour la production de gouttelettes de film. Cette étude approfondit la dynamique des trous dans les films liquides libres, avec des simulations numériques et des approches analytiques. Utilisant Basilisk, un solveur de flux à deux phases basé sur la méthode Volume-of-Fluid (VoF) et écrit en C, nous avons analysé finement le mécanisme de cicatrisation. Des simulations dichotomiques à maillage adaptatif haute résolution ont permis de déterminer le seuil de cicatrisation. Les approches analytiques ont été utilisées pour développer des hypothèses afin de prédire le seuil de cicatrisation d'un trou sur un film, qui ont été testées contre les résultats numériques. La dynamique critique du trou a été examinée, et des lois de puissance distinctes ont été identifiées pour la courbure de pointe afin d'illustrer le mécanisme moteur. Les variations du seuil de cicatrisation du trou avec d'autres paramètres du problème ont été examinées. Cette étude a d'abord été menée pour un film plat, découvrant que le seuil de cicatrisation est augmenté en augmentant le nombre de Laplace du film. Cet effet était prononcé pour des valeurs allant de 1 à 10000, coïncidant avec la gamme habituelle des nombres de Laplace de film observés pour les bulles éclatantes océaniques. Les effets observés ont également été élaborés, avec des explications physiques. Étant donné que la forme initiale exacte du trou s'est révélée influencer le seuil de cicatrisation, un examen a été effectué pour étudier cet effet sur la cohérence des résultats du changement du nombre de Laplace du film, pris comme exemple pour les autres. Il a été démontré que malgré les variations du seuil pour différentes formes, l'effet du changement du nombre de Laplace du film était indépendant de la forme du trou. Par conséquent, les résultats de la dichotomie se sont avérés indépendants du choix arbitraire de la forme du trou tout au long de l'étude. Une étude similaire a été menée pour un trou dans un chapeau de bulle après une étude détaillée de la dynamique de la bulle et de l'écoulement du gaz. Il a été découvert que l'écoulement de gaz subit un effet Venturi, où un écoulement plus fort, résultant de tailles de bulles plus petites ou de nombres de Laplace de gaz plus élevés, a été montré pour augmenter le seuil de cicatrisation. Une hypothèse a été développée pour prédire l'effet Venturi sur le seuil de cicatrisation, aboutissant à un terme de correction de Venturi qui prédit une dépendance de loi de puissance sur le diamètre de la bulle, ce qui correspondait aux résultats numériques. L'effet Venturi était significatif pour des valeurs élevées du nombre de Laplace du gaz, où le seuil de cicatrisation était doublé en augmentant la courbure moyenne du film d'un film plat à un chapeau de bulle avec une taille 20 fois l'épaisseur du chapeau de bulle. Ces résultats fournissent une compréhension complète du phénomène de cicatrisation des trous, en particulier dans l'éclatement du film océanique. Le présent travail offre également une base pour les futures études sur le phénomène d'éclatement du film impliquant des dynamiques complexes, y compris la cicatrisation des trous
Oceanic film bursting is a phenomenon in which a thin liquid film representing the cap of the bubble bursts at the surface of the ocean, producing film drops. The film bursting phenomenon is critical in ocean-atmosphere exchanges, particularly in transferring heat, mass, and momentum between the ocean and the atmosphere. The film bursting phenomenon comprises a series of complex dynamics, such as drainage, puncture, film retraction, and film disintegration into film drops. The hole healing (i.e., when a hole is too small and is closed after its nucleation) is a critical parameter that could impact the film bursting dynamics, particularly the film thickness at bursting and, thus, the liquid budget for the film drop production. The present work investigates the dynamics of holes in free liquid films, presenting a comprehensive understanding of the hole-healing phenomenon while focusing on the film bursting in the oceanic context. This was achieved through a combination of numerical simulations and analytical approaches. The numerical simulations were carried out using Basilisk. This robust and efficient two-phase flow solver is based on a Volume-of-Fluid (VoF) method and written using the C-programming language. The underlying mechanism for the hole-healing phenomenon was studied in detail. The dichotomy simulations for the determination of the healing threshold carried out in this work have used high-resolution mesh refinement. This was possible by using an adaptive mesh scheme provided by Basilisk. The analytical approaches were used to develop hypotheses to predict the healing threshold of a hole on a film, which were tested against numerical results. The critical dynamics of the hole are examined, and distinct power laws were identified for the tip curvature to illustrate the driving mechanism. The variations in the hole healing threshold with other problem parameters were examined. This study was first carried out for a flat film, discovering that the healing threshold is increased by increasing the film Laplace number. This effect was pronounced for values ranging from 1 to 10000, coinciding with the customary range of film Laplace numbers observed for oceanic bursting bubbles. The observed effects were also elaborated upon, along with physical explanations. Since the exact initial shape of the hole was shown to influence the healing threshold, an examination was carried out to study this effect on the consistency of the results from changing the film Laplace number, taken as an example for the other. It was shown that despite variations in the threshold for different shapes, the effect of changing the film Laplace number was independent of the hole shape. Therefore, the dichotomy results were shown to be independent of the arbitrary choice of the hole shape throughout the study. A similar study was carried out for a hole in a bubble cap after a detailed study of the bubble and gas outflow dynamics. It was discovered that the gas outflow undergoes a Venturi effect, where a stronger outflow, resulting from smaller bubble sizes or higher gas Laplace numbers, was shown to increase the healing threshold. A hypothesis was developed to predict the Venturi effect on the healing threshold, resulting in a Venturi correction term that predicted a power law dependency on the bubble diameter, which agreed with the numerical results. The Venturi effect was significant for high values of the gas Laplace number, where the healing threshold was doubled by increasing the film mean curvature from a flat film to a bubble cap with a size 20 times the bubble cap thickness. These findings provide a comprehensive understanding of the hole-healing phenomenon, particularly in oceanic film bursting. The present work also offers a foundation for future studies on the film-bursting phenomenon involving complex dynamics, including hole healing
3

Licht, David. "Effective Dynamics of Black Hole Horizons." Doctoral thesis, Universitat de Barcelona, 2021. http://hdl.handle.net/10803/671802.

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In this thesis we present a new aspect pertaining to the effective field theory of general relativity in the limit of a large number D of dimensions. We demonstrate that the theory initially developed to capture the physics of asymptotically flat branes also contains a new family of localized solutions that can be identified with higher dimensional black holes such as the Schwarzschild-Thangerlini or the Myers-Perry black holes in the limit of a large number of spacetime dimensions. Using this technique we have explored several new aspects of these black hole solutions. We show that the effective large D equations for the asymptotically flat brane also contain an analytic solution that is a gaussian blob (with the same topology as the flat membrane). The blob actually corresponds to a magnification of the geometry near the cap (north-pole) of the black hole. We calculate their (slow) quasi-normal spectrum, which captures the stability of Schwarzschild black holes and also the instability of ultraspinning Myers-Perry black holes. Additionally we find novel class of rotating black bar solutions, that appear as stationary objects in the effective theory since they can not radiate gravitational waves which are decoupled from the effective theory. We describe a method that allows to construct (Maxwell) charged solutions form every non- charged solution that the large D theory contains. Using this method we construct charged and rotating black holes in the Einstein-Maxwell theory. Furthermore we explore the solutions that branch of from the (ultra-spinning) Myers-Perry (MP) black hole and the non-linear extensions of the zero-modes of the analytically known black bar. We study the evolution of higher dimensional black hole collisions by solving numerically the effective equations of motion. We demonstrate that in these collisions it is possible to form black holes with elongated horizons such as black bars and dumbbells. At high enough angular momentum the black bars and dumbbells can be so elongated that they are susceptible to a Greggory-Laflamme type instability, that leads to the a pinch off of the horizon towards a naked singularity. Accordingly this demonstrates a novel example of a violation of weak cosmic censorship in the quintessential process of general relativity: the collision of black holes. Furthermore we study the evolution and decay of ultraspinning MP black holes, and observe remarkably rich structure in the intermediate states of the decay. Lastly, we study how entropy production and irreversibility appear in the large D effective theory. With this tool we study how black hole entropy is generated in several highly dynamical processes, such as the fusion of black holes and the fission of unstable solutions into multiple black holes. We find the black hole fusion is highly irreversible, while fission which follows the decay of unstable black strings generates much less entropy. Additionally we describe how in processes that contain fusion and fission the intermediate state is quasi-thermalized.
En esta tesis hemos presentado un nuevo aspecto perteneciente a la teoría efectiva de la relatividad general en el límite de un gran número de dimensiones. Hemos demostrado que la teoría desarrollada inicialmente para capturar la física de las branas asintóticamente planas también contiene una nueva familia de soluciones localizadas que pueden ser identificadas con agujeros negros de dimensiones más altas como los agujeros negros de Schwarzschild- Thangerlini o de Myers-Perry en el límite de gran D. Usando esta técnica hemos explorado varios aspectos nuevos de dichos agujeros negros. Encontramos una nueva clase de soluciones de barras negras giratorias, que aparecen como objetos estacionarios en la teoría efectiva Describimos un método que permite construir soluciones cargadas a partir de cada solución no cargada. Usando este método construimos agujeros negros cargados y giratorios en la teoría de Einstein-Maxwell. Estudiamos la evolución de las colisiones de agujeros negros en dimensiones superiores usando las ecuaciones efectivas. Demostramos que en estas colisiones es posible formar agujeros negros con horizontes alargados como barras negras o con forma de mancuernas. Con un momento angular lo suficientemente alto, las barras negras pueden ser tan alargadas que son susceptibles a una inestabilidad tipo Greggory-Laflamme, que lleva a una rotura del horizonte y a una singularidad desnuda. Por consiguiente, esto demuestra un ejemplo novedoso de una violación de la hipótesis de 'cosmic censorship' (censura cósmica). Además estudiamos la evolución y el decaimiento de los agujeros negros MP ultraspinning, y observamos una estructura notablemente rica en los estados intermedios del decaimiento.
4

Pacilio, Costantino. "Classical and quantum aspects of black hole dynamics." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amslaurea.unibo.it/7532/.

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Il contenuto fisico della Relatività Generale è espresso dal Principio di Equivalenza, che sancisce l'equivalenza di geometria e gravitazione. La teoria predice l'esistenza dei buchi neri, i più semplici oggetti macroscopici esistenti in natura: essi sono infatti descritti da pochi parametri, le cui variazioni obbediscono a leggi analoghe a quelle della termodinamica. La termodinamica dei buchi neri è posta su basi solide dalla meccanica quantistica, mediante il fenomeno noto come radiazione di Hawking. Questi risultati gettano una luce su una possibile teoria quantistica della gravitazione, ma ad oggi una simile teoria è ancora lontana. In questa tesi ci proponiamo di studiare i buchi neri nei loro aspetti sia classici che quantistici. I primi due capitoli sono dedicati all'esposizione dei principali risultati raggiunti in ambito teorico: in particolare ci soffermeremo sui singularity theorems, le leggi della meccanica dei buchi neri e la radiazione di Hawking. Il terzo capitolo, che estende la discussione sulle singolarità, espone la teoria dei buchi neri non singolari, pensati come un modello effettivo di rimozione delle singolarità. Infine il quarto capitolo esplora le ulteriori conseguenze della meccanica quantistica sulla dinamica dei buchi neri, mediante l'uso della nozione di entropia di entanglement.
5

Wang, Xiaoya. "Theory of heavy-hole spin-echo dynamics." Thesis, McGill University, 2014. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=123115.

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In this work, we theoretically investigate hyperfine-induced effects on the spin-echo dynamics of a heavy hole in a quantum dot. We consider an in-plane applied magnetic field perpendicular to fluctuations arising from the hyperfine interaction, which drives the system into a motional averaging regime when the relevant (hole or nuclear) Zeeman energy scale exceeds the amplitude of hyperfine-induced fluctuations in the Overhauser field. For the parameters in Ref. [1], this system enters a motional averaging regime at moderate magnetic fields of the order of 1 T. In this regime, rapid spin precession about the external field effectively averages the out-of-plane fluctuations to zero, enabling the complete suppression of spin-echo envelope decay due to hyperfine coupling. We also predict the coherence dynamics to be strongly anisotropic, a property relevant to the discussion of electric-field-induced fluctuations currently limiting coherence times in single hole-spin experiments[2, 3]. More precisely, we find an alternative set of initialization and π-rotation axes which push the effects of electric-field-induced fluctuations out to very long timescales of the order of seconds for typical experimental parameters[2]. The anisotropy of this system also leads to counter-intuitive behaviour of the spin purity, an observable which quantifies the degree of spin-qubit polarization remaining after entangling with an environment for some time t. We find the spin purity to be maximally preserved when initializing along the hyperfine-induced fluctuations, in a superposition of Zeeman eigenstates. These results provide further evidence of the robustness of heavy-hole spin qubits, and pave the way for prolonging hole-spin coherence by optimizing the geometry of the system.
Dans ce mémoire, nous étudions les effets de l'interaction hyperfine sur l'écho de spin d'un trou lourd localisé dans une boîte quantique. Nous considérons l'application d'un champ magnétique perpendiculaire aux fluctuations causéespar l'interaction hyperfine, qui entraîne le système dans un régime de moyenne motionnelle lorsque l'énergie Zeeman pertinente (du trou ou des noyaux nucléaires) dépasse l'amplitude des fluctuations dans le champ de Overhauser. Avec les paramètres utilisés dans la Réf. [1], le régime de moyenne motionnelle est atteint pour un champ magnétique de l'ordre de 1 T. Dans ce régime, la précession rapide du spin autour du champ magnétique externe a l'effet d'une moyenne sur les fluctuations hyperfines, ce qui permet la suppression complète de la décroissance de l'enveloppe du signal de l'écho de spin. Nous prédisons aussi une anisotropie présente dans la dynamique de cohérence qui serait pertinente à la discussion des fluctuations du champ électrique, fluctuations qui limitent les temps de cohérence dans des expériences actuelles[2, 3]. Plus précisément, nous trouvons des directions d'initialisation et de rotation qui repoussent les effets des fluctuations électriques jusqu'à des échelles de temps de l'ordre de plusieurs secondes pour des paramètres expérimentaux typiques[2]. L'anisotropie du système est également responsable d'un comportement inattendu de la pureté du spin, qui quantifie la polarisation restante du qubit de spin suivant l'enchevêtrement avec un environnement pendant un temps t. Nous montrons que la pureté du spin est préservée au maximum pour une initialisation parallèle aux fluctuations hyperfines, dans une superposition d'états propres Zeeman. Ces résultats fournissent une preuve supplémentaire du potentiel des qubits de spin de trou lourd, et permettent de prolonger leur cohérence en optimisant la géométrie du système.
6

Cáceres, Alejandro. "Electron dynamics in a black hole background." Thesis, University of Cambridge, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.614691.

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Brunner and Michael. "Single hole dynamics in the t-J model." Phd thesis, Universitaet Stuttgart, 2000. http://elib.uni-stuttgart.de/opus/volltexte/2000/597/index.html.

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De, Villiers Jean-Pierre. "Dynamics of cosmic strings in black hole spacetimes." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape15/PQDD_0012/NQ34754.pdf.

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Ziogas, Vaios. "Transport at strong coupling and black hole dynamics." Thesis, Durham University, 2018. http://etheses.dur.ac.uk/12683/.

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In this thesis we study aspects of transport in strongly coupled quantum systems with broken translational symmetry. Using holographic duality, we also examine the associated dynamical problem in asymptotically Anti-de Sitter, spatially modulated black holes. More precisely, in chapter 2 we consider the transport of conserved charges in spatially inhomogeneous quantum systems with a discrete lattice symmetry. When the DC conductivities are finite, we derive a set of generalised Einstein relations, relating the diffusion constants of the conserved charges to the DC conductivities and static susceptibilities. We also develop a long-wavelength expansion in order to explicitly construct the heat and charge diffusive modes within hydrodynamics on curved manifolds. In chapter 3 we used analogous techniques to construct the thermoelectric diffusive quasinormal modes in a large class of black hole spacetimes that are holographically dual to strongly coupled field theories in which spatial translations are broken explicitly. These modes satisfy a set of constraints on the black hole horizon, from which we find that their dispersion relations are given by the generalised Einstein relations. In chapter 4 we define a boost incoherent current in spontaneously modulated phases, and we show that in holographic theories, its DC conductivity can be obtained from solving a system of horizon Stokes equations.
10

Brunner, Michael. "Single hole dynamics in the t-J model." [S.l.] : Universität Stuttgart , Fakultät Physik, 2000. http://www.bsz-bw.de/cgi-bin/xvms.cgi?SWB8473264.

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Books on the topic "Hole dynamics":

1

Winter Workshop on Nuclear Dynamics (8th 1992 Jackson Hole, Wyo.). Advances in nuclear dynamics: Proceedings of the 8th Winter Workshop on Nuclear Dynamics, Jackson Hole, Wyoming, USA, 18-25 January 1992. Edited by Bauer W. 1959- and Back B. Singapore: World Scientific, 1992.

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2

United States. National Aeronautics and Space Administration., ed. Numerical simulation of receptivity and transition in a boundary layer on a flat plate with a suction hole. Tucson, Ariz: Engineering Experiment Station College of Engineering and Mines, University of Arizona, 1994.

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United States. National Aeronautics and Space Administration., ed. Numerical simulation of receptivity and transition in a boundary layer on a flat plate with a suction hole. Tucson, Ariz: Engineering Experiment Station College of Engineering and Mines, University of Arizona, 1994.

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Texas A & M University. Turbomachinery Laboratories. and United States. National Aeronautics and Space Administration., eds. SSME seal test program: Test results for hole-pattern damper seals : interim progress report. College Station, Texas: Turbomachinery Laboratories, Mechanical Engineering Department, Texas A&M University, 1985.

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Childs, Dara W. SSME seal test program: Test results for smooth, hole-pattern, and helically grooved stators : interim progress report. College Station, Tex: Texas A&M, Turbomachinery Laboratories, Mechanical Engineering Dept., 1987.

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Serebryakov, Andrey, and Gennadiy Zhuravlev. Exploitation of oil and gas fields by horizontal wells. ru: INFRA-M Academic Publishing LLC., 2021. http://dx.doi.org/10.12737/971768.

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The textbook describes the design features of offshore horizontal multi-hole production wells, as well as the bottom-hole components of horizontal multi-hole wells. The classification of complications of multi-hole horizontal wells, methods of their prevention and elimination are given. Methods of underground geonavigation of the development of offshore horizontal production wells are proposed. The geological and field bases of operation of horizontal offshore multi-hole oil and gas wells, modes and dynamics of oil, gas and associated water production, methods for calculating dynamic bottom-hole and reservoir pressures are specified. The technologies of operation of offshore horizontal multi-hole wells are presented. The composition and scope of environmental, field and research marine monitoring of the operation of offshore horizontal multi-hole wells and the protection of the marine environment in the production of oil and gas are justified. Meets the requirements of the federal state educational standards of higher education of the latest generation. It is intended for undergraduates of the enlarged group of "Earth Sciences" training areas, as well as for teachers, employees of the fuel and energy complex, industrial geological exploration and oil and gas production enterprises, scientific and design organizations.
7

Aretakis, Stefanos. Dynamics of Extremal Black Holes. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-95183-6.

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Hemsendorf, Marc. Dynamics of black holes in galactic centres. Aachen: Shaker, 2000.

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1951-, McConnell C. Douglas, ed. The Holy Spirit and mission dynamics. Pasadena, Calif: William Carey Library, 1997.

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Ballhaus, W. F. Advances in Fluid Dynamics: Proceedings of the Symposium in Honor of Maurice Holt on His 70th Birthday. New York, NY: Springer New York, 1989.

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Book chapters on the topic "Hole dynamics":

1

Aarseth, Sverre J. "Black Hole Binary Dynamics." In Fred Hoyle’s Universe, 87–92. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-017-1605-5_12.

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Laguna, Pablo, and Deirdre M. Shoemaker. "9 Computational Black Hole Dynamics." In The Physics of the Early Universe, 277–98. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-540-31535-3_9.

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Israel, Werner. "Thermodynamics and Internal Dynamics of Black Holes: Some Recent Developments." In Black Hole Physics, 147–83. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-2420-1_4.

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Larson, Richard B. "Black-Hole Remnants in Globular Clusters." In Dynamics of Star Clusters, 421–22. Dordrecht: Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-009-5335-2_48.

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Brunner, Michael, Catia Lavalle, Sylvain Capponi, Martin Feldbacher, Fakher F. Assaad, and Alejandro Muramatsu. "Single Hole Dynamics in Correlated Insulators." In High Performance Computing in Science and Engineering ’01, 145–56. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/978-3-642-56034-7_13.

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Duncan, Martin J. "Can a Moderately Massive Black Hole Reverse Core Collapse?" In Dynamics of Star Clusters, 415–17. Dordrecht: Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-009-5335-2_46.

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Aretakis, Stefanos. "Introduction to General Relativity and Black Hole Dynamics." In Dynamics of Extremal Black Holes, 3–36. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-95183-6_1.

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Ali Alpar, M. "Superfluid Dynamics and Energy Dissipation in Neutron Stars." In The Neutron Star—Black Hole Connection, 57–70. Dordrecht: Springer Netherlands, 2001. http://dx.doi.org/10.1007/978-94-010-0548-7_4.

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Newman, Paul A. "Chemistry and dynamics of the Antarctic Ozone Hole." In The Stratosphere: Dynamics, Transport, and Chemistry, 157–71. Washington, D. C.: American Geophysical Union, 2010. http://dx.doi.org/10.1029/2009gm000873.

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Brügmann, Bernd, Ulrich Sperhake, Doreen Müller, Roman Gold, Pablo Galaviz, Nobert Lages, and Marcus Thierfelder. "Project h1021: Dynamics of Binary Black Hole Systems." In High Performance Computing in Science and Engineering, Garching/Munich 2009, 395–407. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-13872-0_33.

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Conference papers on the topic "Hole dynamics":

1

KOLOMEITSEV, E. E., and D. N. VOSKRESENSKY. "PARTICLE–HOLE DYNAMICS." In Proceedings of the Conference “Kadanoff-Baym Equations: Progress and Perspectives for Many-Body Physics”. WORLD SCIENTIFIC, 2000. http://dx.doi.org/10.1142/9789812793812_0025.

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Cornean, Horia, Sergey Sorokin, and Benjamin Støttrup. "ACOUSTIC BLACK HOLE PROFILE OPTIMIZATION." In XI International Conference on Structural Dynamics. Athens: EASD, 2020. http://dx.doi.org/10.47964/1120.9202.20000.

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Prüll, Alexander. "Hole burning: A discrete kinetic approach." In RAREFIED GAS DYNAMICS: 22nd International Symposium. AIP, 2001. http://dx.doi.org/10.1063/1.1407543.

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Kawamura, J. "NMR Hole-Burning Experiments on Superionic Conductor Glasses." In SLOW DYNAMICS IN COMPLEX SYSTEMS: 3rd International Symposium on Slow Dynamics in Complex Systems. AIP, 2004. http://dx.doi.org/10.1063/1.1764268.

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Ohno, M., and W. von Niessen. "Dynamics of valence hole excitations in adsorbates." In Synchrotron radiation and dynamic phenomena. AIP, 1992. http://dx.doi.org/10.1063/1.42530.

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Ohno, M., and P. Decleva. "Dynamics of core hole excitations in adsorbates." In Synchrotron radiation and dynamic phenomena. AIP, 1992. http://dx.doi.org/10.1063/1.42534.

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Noack, Ralph. "A Direct Cut Approach for Overset Hole Cutting." In 18th AIAA Computational Fluid Dynamics Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2007. http://dx.doi.org/10.2514/6.2007-3835.

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Kugler, M., T. Korn, M. Hirmer, D. Schuh, W. Wegscheider, C. Schüller, Jisoon Ihm, and Hyeonsik Cheong. "Controlling hole spin dynamics in two-dimensional hole systems at low temperatures." In PHYSICS OF SEMICONDUCTORS: 30th International Conference on the Physics of Semiconductors. AIP, 2011. http://dx.doi.org/10.1063/1.3666584.

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Attenberger, T., and U. Bogner. "Crystalline Model Systems Probing Dynamics and Electric-Field Effects." In Persistent Spectral Hole Burning: Science and Applications. Washington, D.C.: Optica Publishing Group, 1991. http://dx.doi.org/10.1364/pshb.1991.fe9.

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Recently in studies of fluorescence excitation and persistent spectral hole burning (PSHB) of single molecules in crystalline environment spectral jumps have been observed at 1.5 K providing new insights into the low temperature dynamics of the condensed phase [1]. The connection between PSHB and the phonon-induced dynamics in asymmetric double-well-potentials (DWP) has been used in a photophysical model of PSHB explaining also phonon detection by refilling of a spectral hole observed after irradiation with nanosecond heat pulses [2]. These DWP have been originally introduced in order to explain anomalous acoustic and thermal properties of amorphous materials by the socalled two-level systems, the existence of which is due to tunneling in DWP with appropriate parameters. The photophysical model is based on spectral shifts (matrix-shift-variations) caused by phonon-induced crossing of the barriers which can occur in all DWP if the phonon frequency is high enough.
10

Wang, Xiao-jun, and W. M. Dennis. "Spectral and Temporal Dynamics of Nonequilibrium Phonons in YAG:Pr3+." In Persistent Spectral Hole Burning: Science and Applications. Washington, D.C.: Optica Publishing Group, 1991. http://dx.doi.org/10.1364/pshb.1991.fc3.

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We have investigated the spectral and temporal dynamics associated with phonon decay in the YAG:Pr3+ system at a range of temperature between 9 and 25 K. Nonequilibrium phonons were generated using defect induced one phonon absorption (DIOPA) of far infrared (FIR) radiation1. Phonon detection was achieved optically using a variation of absorption vibronic sideband phonon spectroscopy2.

Reports on the topic "Hole dynamics":

1

Matsuzaki, Satoshi. Nonphotochemical Hole-Burning Studies of Energy Transfer Dynamics in Antenna Complexes of Photosynthetic Bacteria. Office of Scientific and Technical Information (OSTI), January 2001. http://dx.doi.org/10.2172/804159.

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Elliott, J. Hydra modeling of experiments to study ICF capsule fill hole dynamics using surrogate targets. Office of Scientific and Technical Information (OSTI), August 2007. http://dx.doi.org/10.2172/925990.

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Matsuzaki, Satoshi. Nonphotochemical Hole-Burning Studies of Energy Transfer Dynamics in Antenna Complexes of Photosynthetic Bacteria. Office of Scientific and Technical Information (OSTI), January 2001. http://dx.doi.org/10.2172/797635.

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Tang, De-Ming. Excited state structure, energy and electron transfer dynamics of photosynthetic reaction centers: A hole burning study. Office of Scientific and Technical Information (OSTI), March 1991. http://dx.doi.org/10.2172/6120575.

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5

Moerner, W. E. Photochemical and Photophysical Dynamics of Persistent Spectral Hole-Burning, Photorefractivity and Single Molecular Absorbers in Condensed Matter. Fort Belvoir, VA: Defense Technical Information Center, August 1992. http://dx.doi.org/10.21236/ada255333.

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6

Riley, Kerry Joseph. Probing the Energy Transfer Dynamics of Photosynthetic Reaction Center Complexes Through Hole-Burning and Single-Complex Spectroscopy. Office of Scientific and Technical Information (OSTI), January 2007. http://dx.doi.org/10.2172/933127.

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7

Wu, H. M. Hole burning with pressure and electric field: A window on the electronic structure and energy transfer dynamics of bacterial antenna complexes. Office of Scientific and Technical Information (OSTI), February 1999. http://dx.doi.org/10.2172/348905.

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Hane, Jennifer Kazuko. The picosecond dynamics of electron-hole pairs in graded and homogeneous CdSxSe1-x semiconductors. Office of Scientific and Technical Information (OSTI), May 1995. http://dx.doi.org/10.2172/88836.

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Kulkarni, M., A. Patel, and K. Leung. Mobile IPv4 Dynamic Home Agent (HA) Assignment. RFC Editor, March 2006. http://dx.doi.org/10.17487/rfc4433.

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Lafreniere, Robert A., and Roger Tryon. Dynamic Measurements of Three Urethane Hose Materials. Fort Belvoir, VA: Defense Technical Information Center, May 1995. http://dx.doi.org/10.21236/ada640492.

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