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Relevant bibliographies by topics / Electrodynamical coupling

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Academic literature on the topic 'Electrodynamical coupling'

Author: Grafiati

Published: 6 September 2023

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Journal articles on the topic "Electrodynamical coupling"

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Sentef, M. A., M. Ruggenthaler, and A. Rubio. "Cavity quantum-electrodynamical polaritonically enhanced electron-phonon coupling and its influence on superconductivity." Science Advances 4, no. 11 (November 2018): eaau6969. http://dx.doi.org/10.1126/sciadv.aau6969.

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So far, laser control of solids has been mainly discussed in the context of strong classical nonlinear light-matter coupling in a pump-probe framework. Here, we propose a quantum-electrodynamical setting to address the coupling of a low-dimensional quantum material to quantized electromagnetic fields in quantum cavities. Using a protoypical model system describing FeSe/SrTiO3with electron-phonon long-range forward scattering, we study how the formation of phonon polaritons at the two-dimensional interface of the material modifies effective couplings and superconducting properties in a Migdal-Eliashberg simulation. We find that through highly polarizable dipolar phonons, large cavity-enhanced electron-phonon couplings are possible, but superconductivity is not enhanced for the forward-scattering pairing mechanism due to the interplay between coupling enhancement and mode softening. Our results demonstrate that quantum cavities enable the engineering of fundamental couplings in solids, paving the way for unprecedented control of material properties.

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Singh, A. K., Devendraa Siingh, R. P. Singh, and Sandhya Mishra. "Electrodynamical Coupling of Earth's Atmosphere and Ionosphere: An Overview." International Journal of Geophysics 2011 (2011): 1–13. http://dx.doi.org/10.1155/2011/971302.

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Electrical processes occurring in the atmosphere couple the atmosphere and ionosphere, because both DC and AC effects operate at the speed of light. The electrostatic and electromagnetic field changes in global electric circuit arise from thunderstorm, lightning discharges, and optical emissions in the mesosphere. The precipitation of magnetospheric electrons affects higher latitudes. The radioactive elements emitted during the earthquakes affect electron density and conductivity in the lower atmosphere. In the present paper, we have briefly reviewed our present understanding of how these events play a key role in energy transfer from the lower atmosphere to the ionosphere, which ultimately results in the Earth's atmosphere-ionosphere coupling.

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Onohara, A. N., I. S. Batista, and H. Takahashi. "The ultra-fast Kelvin waves in the equatorial ionosphere: observations and modeling." Annales Geophysicae 31, no. 2 (February 7, 2013): 209–15. http://dx.doi.org/10.5194/angeo-31-209-2013.

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Abstract. The main purpose of this study is to investigate the vertical coupling between the mesosphere and lower thermosphere (MLT) region and the ionosphere through ultra-fast Kelvin (UFK) waves in the equatorial atmosphere. The effect of UFK waves on the ionospheric parameters was estimated using an ionospheric model which calculates electrostatic potential in the E-region and solves coupled electrodynamics of the equatorial ionosphere in the E- and F-regions. The UFK wave was observed in the South American equatorial region during February–March 2005. The MLT wind data obtained by meteor radar at São João do Cariri (7.5° S, 37.5° W) and ionospheric F-layer bottom height (h'F) observed by ionosonde at Fortaleza (3.9° S; 38.4° W) were used in order to calculate the wave characteristics and amplitude of oscillation. The simulation results showed that the combined electrodynamical effect of tides and UFK waves in the MLT region could explain the oscillations observed in the ionospheric parameters.

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McKinney, J. C., and R. Narayan. "Disc-jet coupling in black hole accretion systems - II. Force-free electrodynamical models." Monthly Notices of the Royal Astronomical Society 375, no. 2 (February 21, 2007): 531–47. http://dx.doi.org/10.1111/j.1365-2966.2006.11220.x.

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Passante, Roberto. "Dispersion Interactions between Neutral Atoms and the Quantum Electrodynamical Vacuum." Symmetry 10, no. 12 (December 10, 2018): 735. http://dx.doi.org/10.3390/sym10120735.

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Dispersion interactions are long-range interactions between neutral ground-state atoms or molecules, or polarizable bodies in general, due to their common interaction with the quantum electromagnetic field. They arise from the exchange of virtual photons between the atoms, and, in the case of three or more atoms, are not additive. In this review, after having introduced the relevant coupling schemes and effective Hamiltonians, as well as properties of the vacuum fluctuations, we outline the main properties of dispersion interactions, both in the nonretarded (van der Waals) and retarded (Casimir–Polder) regime. We then discuss their deep relation with the existence of the vacuum fluctuations of the electromagnetic field and vacuum energy. We describe some transparent physical models of two- and three-body dispersion interactions, based on dressed vacuum field energy densities and spatial field correlations, which stress their deep connection with vacuum fluctuations and vacuum energy. These models give a clear insight of the physical origin of dispersion interactions, and also provide useful computational tools for their evaluation. We show that this aspect is particularly relevant in more complicated situations, for example when macroscopic boundaries are present. We also review recent results on dispersion interactions for atoms moving with noninertial motions and the strict relation with the Unruh effect, and on resonance interactions between entangled identical atoms in uniformly accelerated motion.

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Bagiya, Mala S., K. N. Iyer, H. P. Joshi, Smitha V. Thampi, Takuya Tsugawa, Sudha Ravindran, R. Sridharan, and B. M. Pathan. "Low-latitude ionospheric-thermospheric response to storm time electrodynamical coupling between high and low latitudes." Journal of Geophysical Research: Space Physics 116, A1 (January 2011): n/a. http://dx.doi.org/10.1029/2010ja015845.

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Schäfer, Christian, Michael Ruggenthaler, Heiko Appel, and Angel Rubio. "Modification of excitation and charge transfer in cavity quantum-electrodynamical chemistry." Proceedings of the National Academy of Sciences 116, no. 11 (February 7, 2019): 4883–92. http://dx.doi.org/10.1073/pnas.1814178116.

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Energy transfer in terms of excitation or charge is one of the most basic processes in nature, and understanding and controlling them is one of the major challenges of modern quantum chemistry. In this work, we highlight that these processes as well as other chemical properties can be drastically altered by modifying the vacuum fluctuations of the electromagnetic field in a cavity. By using a real-space formulation from first principles that keeps all of the electronic degrees of freedom in the model explicit and simulates changes in the environment by an effective photon mode, we can easily connect to well-known quantum-chemical results such as Dexter charge-transfer and Förster excitation-transfer reactions, taking into account the often-disregarded Coulomb and self-polarization interaction. We find that the photonic degrees of freedom introduce extra electron–electron correlations over large distances and that the coupling to the cavity can drastically alter the characteristic charge-transfer behavior and even selectively improve the efficiency. For excitation transfer, we find that the cavity renders the transfer more efficient, essentially distance-independent, and further different configurations of highest efficiency depending on the coherence times. For strong decoherence (short coherence times), the cavity frequency should be in between the isolated excitations of the donor and acceptor, while for weak decoherence (long coherence times), the cavity should enhance a mode that is close to resonance with either donor or acceptor. Our results highlight that changing the photonic environment can redefine chemical processes, rendering polaritonic chemistry a promising approach toward the control of chemical reactions.

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Kherani, E. A., R. Raghavarao, and R. Sekar. "Equatorial rising structure in nighttime upper E-region: a manifestation of electrodynamical coupling of spread F." Journal of Atmospheric and Solar-Terrestrial Physics 64, no. 12-14 (August 2002): 1505–10. http://dx.doi.org/10.1016/s1364-6826(02)00087-1.

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Teubner, P. J. O., V. Karaganov, M. R. Law, and P. M. Farrell. "Superelastic electron scattering from calcium and lithium." Canadian Journal of Physics 74, no. 11-12 (November 1, 1996): 984–90. http://dx.doi.org/10.1139/p96-818.

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Superelastic scattering experiment were performed on optically pumped calcium atoms at energies of 25.7 and 45 eV referred to the ground state. Orientation and alignment parameters derived from these experiments are compared with the predictions of several theories based on a distorted-wave formalism. The agreement between theory and experiment is unsatisfactory at the lower energy at all scattering angles. At the higher energy agreement improves at small scattering angles but is poor at middle angles. The results of our quantum electrodynamical calculation on optical pumping in lithium are compared with our observations. We find such good agreement between theory and experiment that we explore the possibility of superelastic scattering experiments on lithium atoms that are optically pumped with single-frequency laser light. A two-frequency pumping system is described and its use in the observation of superelastic scattering from lithium is discussed. Orientation and alignment parameters are presented at an equivalent energy of 21.8 eV for small angles. They are compared with those predicted by two close-coupling calculations. Excellent agreement is found between the present work and the convergent close-coupling theory of Bray.

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Ip, W. H., C. M. Liu, and K. C. Pan. "Transport and electrodynamical coupling of nano-grains ejected from the Saturnian rings and their possible ionospheric signatures." Icarus 276 (September 2016): 163–69. http://dx.doi.org/10.1016/j.icarus.2016.04.004.

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Dissertations / Theses on the topic "Electrodynamical coupling"

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Leeder, Jamie M. "Novel nonlinear processes, higher-order molecular coupling and multiphoton interactions : a quantum electrodynamical formulation." Thesis, University of East Anglia, 2011. https://ueaeprints.uea.ac.uk/39141/.

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Flick, Johannes [Verfasser], Claudia [Gutachter] Draxl, Angel [Gutachter] Rubio, and Dieter [Gutachter] Bauer. "Exact nonadiabatic many-body dynamics : electron-phonon coupling in photoelectron spectroscopy and light-matter interactions in quantum electrodynamical density-functional theory / Johannes Flick. Gutachter: Claudia Draxl ; Angel Rubio ; Dieter Bauer." Berlin : Mathematisch-Naturwissenschaftliche Fakultät, 2016. http://d-nb.info/1112595929/34.

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Ho, Andy C. T. "Imaginary charge quantum electrodynamics : a running coupling analysis." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape15/PQDD_0005/NQ34551.pdf.

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Rolland, Chloé. "Strong coupling Quantum electrodynamics of a voltage biased Josephson junction." Thesis, Lille 1, 2016. http://www.theses.fr/2016LIL10223/document.

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Dans cette thèse, nous avons étudié le couplage entre le transport de charge dans un conducteur quantique et le rayonnement émis dans son environnement électromagnétique. En effet, le caractère probabiliste du transport électrique dans ce type de conducteurs engendre des fluctuations de courant qui dissipent de l'énergie dans l'environnement sous forme de photons.Pour étudier cette interaction, nous avons utilisé un circuit dans lequel une Jonction Josephson couplée à un résonateur micro-onde est polarisée avec une tension continue. Quand la tension de polarisation atteint la condition pour laquelle le travail fourni par le générateur lorsque la charge d'une paire de Cooper traverse le circuit correspond à l'énergie d'un nombre entier de photons du résonateur, on observe un courant continu de paires de Cooper associé à l'émission de rayonnement dans le résonateur. Ce rayonnement est ensuite collecté dans une ligne de mesure micro-onde. En fabriquant des résonateurs hautes impédances basés sur des inductances planaires, nous avons pu atteindre le régime de fort couplage et observer les effets spectaculaires de cette interaction lumière-matière. D'une part, le régime de fort couplage exacerbe les processus multi-photoniques et nous avons observé jusqu'à l'émission simultanée de neuf photons part une paire de Cooper. De plus en utilisant un montage de type Hanbury-Brown and Twiss, nous avons pu mesurer la statistique des photons émis. Nous avons ainsi démontré que la rétroaction de l'environnement sur la dynamique du transport permet de créer une source non-classique de photons sous-Poissonniens, en accord avec les prédictions théoriques
In this thesis, we investigate the coupling between the charge transport in a quantum conductor and the associated radiation emitted in the electromagnetic environment. In fact, the probabilistic character of the electric transport in this type of conductors generates current fluctuations which dissipate energy in the environment in the form of photons.To study this interaction, we used a circuit in which a Josephson junction is coupled to a microwave resonator and dc voltage biased. When the bias voltage reaches the condition so that the work supplied by the generator when the charge of a Cooper pair passes through the circuit corresponds to the energy of an integer number of photons of the resonator, we observe a dc current of Cooper pairs associated with the emission of radiation in the resonator. This radiation is then collected in a microwave measuring line. By carefully engineering high impedance resonators based on planar inductances, we were able to reach the strong coupling regime and observed the dramatic effects of this light-matter interaction. First, the strong coupling regime favors multi-photon processes and we observed up to the simultaneous emission of nine photons by a single tunneling Cooper pair. In addition, using a Hanbury-Brown and Twiss type, we were able to measure the statistics of the emitted photons. We have demonstrated that the feedback of the environment on the transport dynamics creates a non-classical source of antibunched photons, in agreement with the theoretical predictions

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McNeill, Daniel Owen. "Strong coupling aspects of (2+1) dimensional gauge field theories." Thesis, University of Oxford, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.244631.

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Begley, Stephen Patrick. "Optimisation of the coupling of ion strings to an optical cavity." Thesis, University of Sussex, 2016. http://sro.sussex.ac.uk/id/eprint/61884/.

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In this work, I detail the reconstruction and upgrades performed on the axial cavity ion trap in the ITCM group at the university of Sussex, and the measurement of the coupling of multiple ions to the cavity mode. This enables the optimal coupling between the ions and the cavity by adjusting the ions position in the radial and axial positions. This covers new ground in extending the optimal coupling beyond two ions which is of great importance for experiments with several ions in an optical cavity. The thesis outlines the background theory of light-matter interaction and cavity QED, before describing the physical ion trap hardware and its assembly. A description of the laser and cavity systems is provided, including techniques for locking both to stable references. A number of novel measurement techniques for measuring and maximising the stability of the ions and cavities are presented, including micromotion minimisation, spectroscopy, magnetic field compensation using the ground state Hanle effect, and Raman spectroscopy. These techniques enable the measurement of crucial parameters of the atomic transitions and the cavity. The work culminates in a description of the optimisation of the coupling between ion strings and the cavity first by adjusting the radial trap position by means of variable capacitors attached to RF electrodes, and then axially by means of adjusting the endcap potentials and therefore the spacing between ions to obtain the greatest localisation while still positioning the ions close to the antinodes of the cavity field.

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Wilder, Frederick Durand. "The Non-Linear Electrodynamic Coupling Between the Solar Wind, Magnetosphere and Ionosphere." Diss., Virginia Tech, 2011. http://hdl.handle.net/10919/26586.

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The polar electric potential imposed on the ionosphere by coupling between the earthâ s magnetosphere and the solar wind has been shown to have a non-linear response to the interplanetary electric field (IEF). This dissertation presents an empirical study of this polar cap potential saturation phenomenon. First, the saturation of the reverse convection potential under northward is demonstrated using bin-averaged SuperDARN data. Then, the saturation reverse convection potential is shown to saturate at a higher value at higher solar wind plasma beta. The reverse convection flow velocity is then compared with cross-polar cap flows under southward IMF under summer, winter and equinox conditions. It is demonstrated that the reverse convection flow exhibits the opposite seasonal behavior to cross polar cap flow under southward IMF. Then, an interhemispheric case study is performed to provide an explanation for the seasonal behavior of the reverse convection potential. It is found using DMSP particle precipitation data that the reverse convection cells in the winter circulate at least partially on closed field lines. Finally, SuperDARN and DMSP data are merged to provide polar cap potential measurements for a statistical study of polar cap potential saturation under southward IMF. It is found that the extent of polar cap potential saturation increases with increasing Alfvenic Mach number, and has no significant relation to Alfven wing transmission coefficient or solar wind dynamic pressure.
Ph. D.

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Musso, Andrea. "Losses in electrodynamic transient in superconducting Rutherford cables." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amslaurea.unibo.it/12875/.

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The implementation of a continuum model for the simulation of interstrand coupling currents and the corresponding AC losses in superconducting Rutherford cables, due to electrodynamic transients, is performed. To obtain the necessary level of detail, the electrical model takes into account possible longitudinal variations of the contact conductance. A convergence study is performed to derive the minimum number of mesh elements required. The model is validated comparing loss values per cable twist pitch with the ones obtained through analytical formulae present in literature; an excellent agreement is found. Conclusions are drawn regarding the choice of the boundary conditions and the minimum length of the cable sample, to simulate the behavior of real long cables. In order to suppress losses, a resistive core is inserted in the cable and this strategy is implemented in the model. Induced currents and losses distributions in cables with core are derived and compared with the uncored case; conclusions are drawn about the choice of core width, placement and electrical resistance, to maximize its effect. The model presented is suitable to simulate cables behavior with or without core and subjected to uniform time-varying magnetic fields, considering different geometrical and electrical characteristic.

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Chervy, Thibault. "Strong coupling regime of cavity quantum electrodynamics and its consequences on molecules and materials." Thesis, Strasbourg, 2017. http://www.theses.fr/2017STRAF033/document.

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Cette thèse présente une étude exploratoire de plusieurs aspects du couplage fort lumière-matière dans des matériaux moléculaires. Différentes propriétés héritées d’un tel couplage sont démontrées, ouvrant de nombreuses possibilités d’applications, allant du transfert d’énergie à la génération de signaux optiques non-linéaires et à l’élaboration de réseaux polaritoniques chiraux. Au travers des thématiques abordées, l’idée d’un couplage lumière-matière entrant en compétition avec les différentes fréquences de dissipation des molécules se révèle être cruciale. Ainsi, la prédominance du couplage cohérent au champ électromagnétique apparaît comme un moyen de modifier les propriétés quantiques des états moléculaires, ouvrant la voie à une nouvelle chimie des matériaux en cavité
This thesis presents an exploratory study of several aspects of strong light-matter coupling in molecular materials. Different properties inherited from such a coupling are demonstrated, opening the way to numerous applications, ranging from energy transfer to the generation of non-linear optical signals and to the development of chiral polaritonic networks. Through the topics covered, the idea of a light-matter coupling strength competing with the different frequencies of relaxation of the molecules proves to be crucial. Thus, the predominance of the coherent coupling to the electromagnetic field appears as a new mean of modifying the quantum properties of molecular systems, opening the way to a new chemistry of materials in optical cavities

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Tracy, Brian David. "Lunar Tidal Effects in the Electrodynamics of the Low-Latitude Ionosphere." DigitalCommons@USU, 2013. https://digitalcommons.usu.edu/etd/1968.

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We used extensive measurements made by the Jicamarca Unattended Long-Term Investigations of the Ionosphere and Atmosphere (JULIA) and Incoherent Scatter Radar (ISR) systems at Jicamarca, Peru during geomagnetic quiet conditions to determine the climatologies of lunar tidal effects on equatorial vertical plasma drifts. We use, for the first time, the expectation maximization (EM) algorithm to derive the amplitudes and phases of the semimonthly and monthly lunar tidal perturbations. Our results indicate, as expected, lunar tidal effects can significantly modulate the equatorial plasma drifts. The local time and seasonal dependent phase progression has been studied in much more detail than previously and has shown to have significant variations from the average value. The semimonthly drift amplitudes are largest during December solstice and smallest during June solstice during the day, and almost season independent at night. The monthly lunar tidal amplitudes are season independent during the day, while nighttime monthly amplitudes are largest and smallest in December solstice and autumnal equinox, respectively. The monthly and semimonthly amplitudes decrease from early morning to afternoon and evening to morning with moderate to large increases near dusk and dawn. We also examined these perturbation drifts during periods of sudden stratospheric warmings (SSWs). Our results show, for the first time, the enhancements of the lunar semimonthly tidal effects associated with SSWs to occur at night, as well as during the day. Our results also indicate during SSWs, monthly tidal effects are not enhanced as strongly as the semimonthly effects.

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Books on the topic "Electrodynamical coupling"

1

Y, Kamide. Magnetosphere-ionosphere coupling. Berlin: Springer-Verlag, 1993.

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NATO Advanced Research Workshop on Electromagnetic Coupling in the Polar Clefts and Caps (1988 Lillehammer, Norway). Electromagnetic coupling in the polar clefts and caps. Dordrecht: Kluwer Academic Publishers, 1989.

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V, Nesterenko Mikhail, ed. Analytical and hybrid methods in the theory of slot-hole coupling of electrodynamic volumes. New York: Springer, 2008.

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United States. National Aeronautics and Space Administration., ed. Magnetospheric-ionospheric poynting flux: Final report. Menlo Park, CA: SRI International, 1994.

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United States. National Aeronautics and Space Administration., ed. Magnetospheric-ionospheric poynting flux: Final report. Menlo Park, CA: SRI International, 1994.

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Nesterenko, Mikhail V., Victor A. Katrich, Yuriy M. Penkin, and Sergey L. Berdnik. Analytical and Hybrid Methods in the Theory of Slot-Hole Coupling of Electrodynamic Volumes. New York, NY: Springer New York, 2008. http://dx.doi.org/10.1007/978-0-387-76362-0.

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United States. National Aeronautics and Space Administration., ed. Modeling of the coupled magnetospheric and neutral wind dynamos: Final technical report, SRI project 4604, grant NAGW-3508. Menlo Park, CA: SRI International, 1997.

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Meis, Constantin. Light and vacuum: The wave-particle nature of the light and the quantum vacuum through the coupling of electromagnetic theory and quantum electrodynamics. New Jersey: World Scientific, 2014.

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Baumjohann, W., and Kamide Y. Magnetosphere-Ionosphere Coupling. Springer, 2012.

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Baumjohann, Wolfgang, and Kamide Y. Magnetosphere-Ionosphere Coupling. Springer London, Limited, 2012.

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Book chapters on the topic "Electrodynamical coupling"

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Lyons, L. R., Y. Nishimura, X. Xing, Y. Shi, M. Gkioulidou, C. P. Wang, H. J. Kim, S. Zou, V. Angelopoulos, and E. Donovan. "Auroral Disturbances as a Manifestation of Interplay Between Large-Scale and Mesoscale Structure of Magnetosphere-Ionosphere Electrodynamical Coupling." In Auroral Phenomenology and Magnetospheric Processes: Earth and Other Planets, 193–204. Washington, D. C.: American Geophysical Union, 2012. http://dx.doi.org/10.1029/2011gm001152.

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Sorokin, V. M., and V. M. Chmyrev. "Atmosphere–Ionosphere Electrodynamic Coupling." In The Atmosphere and Ionosphere, 97–146. Dordrecht: Springer Netherlands, 2010. http://dx.doi.org/10.1007/978-90-481-3212-6_3.

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Kamide, Yohsuke, and Wolfgang Baumjohann. "Modeling of Ionospheric Electrodynamics." In Magnetosphere-Ionosphere Coupling, 79–121. Berlin, Heidelberg: Springer Berlin Heidelberg, 1993. http://dx.doi.org/10.1007/978-3-642-50062-6_4.

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Scharf, G. "Other Electromagnetic Couplings." In Finite Quantum Electrodynamics, 335–75. Berlin, Heidelberg: Springer Berlin Heidelberg, 1995. http://dx.doi.org/10.1007/978-3-642-57750-5_6.

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Richmond, Arthur D. "Electrodynamics of Ionosphere–Thermosphere Coupling." In Aeronomy of the Earth's Atmosphere and Ionosphere, 191–201. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-0326-1_13.

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Cram, Lawrence. "Global Electrodynamic Coupling in Stellar Atmospheres." In Mechanisms of Chromospheric and Coronal Heating, 282–86. Berlin, Heidelberg: Springer Berlin Heidelberg, 1991. http://dx.doi.org/10.1007/978-3-642-87455-0_49.

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Semba, Kouichi. "Emerging Ultrastrong Coupling Between Light and Matter Observed in Circuit Quantum Electrodynamics." In International Symposium on Mathematics, Quantum Theory, and Cryptography, 7–8. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-5191-8_3.

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Abstract The strength of the coupling between an atom and a single electromagnetic field mode is defined as the ratio of the vacuum Rabi frequency to the Larmor frequency, and is determined by a small dimensionless physical constant, the fine structure constant $$\alpha =Z_{vac} / 2R_{K}$$. On the other hand, the quantum circuit including Josephson junctions behaving as artificial atoms and it can be coupled to the electromagnetic field with arbitrary strength (Devoret et al. 2007). Therefore, the circuit quantum electrodynamics (circuit QED) is extremely suitable for studying much stronger light-matter interaction.

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Ryutova, Margarita. "Electrodynamic Coupling of Active Region Corona with the Photosphere." In Physics of Magnetic Flux Tubes, 425–64. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-96361-7_16.

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Ryutova, Margarita. "Electrodynamic Coupling of Active Region Corona with the Photosphere." In Physics of Magnetic Flux Tubes, 395–432. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-45243-1_16.

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Vasyliunas, V. M. "Electrodynamics of the Ionosphere/Magnetosphere/Solar Wind System at High Latitudes." In Electromagnetic Coupling in the Polar Clefts and Caps, 1–9. Dordrecht: Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-0979-3_1.

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Conference papers on the topic "Electrodynamical coupling"

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Martín-Ruiz, A., M. Cambiaso, and L. F. Urrutia. "The magnetoelectric coupling in electrodynamics." In Julian Schwinger Centennial Conference. WORLD SCIENTIFIC, 2019. http://dx.doi.org/10.1142/9789811213144_0002.

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Yatsuk, L. P., and A. A. Vusik. "Thin-wire coupling element of adjacent electrodynamic volumes." In 2013 IX International Conference on Antenna Theory and Techniques (ICATT). IEEE, 2013. http://dx.doi.org/10.1109/icatt.2013.6650710.

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Rempe, G., R. J. Thompson, R. J. Brecha, and H. J. Kimble. "Cavity quantum electrodynamics with strong coupling in the optical domain." In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1991. http://dx.doi.org/10.1364/oam.1991.fo1.

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The radiative properties of atoms inside an optical cavity can be dramatically changed with respect to those in free space. In the strong-coupling limit, the reversible dipole interaction between an atom and the cavity field dominates the irreversible decay resulting from spontaneous emission and cavity damping. In this limit the atom and field can no longer be regarded as separate quantities but instead form a composite dynamic system. To enhance the dipole coupling constant and increase the photon storage time, our experiments are performed with a small cavity 1 mm long, with a finesse of 8 × 104. On average, 0.4 photons are sufficient to saturate the resonance transition at 852 nm for the cesium atoms used, while the cooperativity parameter for a single atom is 2. Optical bistability is studied in this system over the range 3 < N < 65 atoms inside the cavity, with the semiclassical theory predicting bistability for N > 5. We report observations of manifestly quantum effects in this regime, including photon antibunching and sub-Poissonian photon statistics, with the magnitude of these nonclassical effects observed to be largely independent of the number of intracavity atoms.

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Alsing, P. M., and C. M. Savage. "Cavity quantum electrodynamics with a small number of atoms." In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1992. http://dx.doi.org/10.1364/oam.1992.wj3.

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With the aid of supercomputer models we numerically investigate the exact solutions for a small number of atoms (typically 1–10) interacting with a single quantized mode of an electromagnetic cavity that is driven by an external coherent field. Effects of spontaneous emission and a nonzero cavity decay rate are included. We investigate the strong coupling regime where the atom-field coupling constant is much greater than the dissipation rates to the external environment. In this regime, the usual system size expansions of quantum statistical physics are not applicable and a full numerical solution is required. We model the recently reported experimental observations of Rabi oscillations in the second order coherence function1 g(2)(τ) and compare and contrast the results with an effective single atom-cavity model with an appropriately scaled coupling constant. In addition, the steady state field distribution for the few-atom-cavity system is explored. A multipeaked phase distribution is found that generalizes the bimodal phase distribution found in the single-atom-cavity case.2 Spectra for the few-atom-cavity system are investigated in the weak and strong driving field limits.

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Ruzziconi, Laura, Mohammad I. Younis, and Stefano Lenci. "Nonlinear Dynamics of a NEMS Carbon Nanotube Resonator." In ASME 2012 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/detc2012-70507.

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In this study we consider a slacked CNT and analyze the nonlinear response under electrostatic and electrodynamic actuation. We introduce a reduced-order model, which takes into account the single-mode dynamics and is derived via the Ritz method and the Padé approximation. The overall scenario of the device behavior is investigated when both the frequency and the electrodynamic voltage are varying. Extensive numerical simulations are performed by the combined use of frequency response diagrams, attractor-basins phase portraits, and frequency-dynamic voltage behavior chart. Our aim is that of illustrating the richness of the nonlinear events that may undergo in the device due to the coupling of mechanical and electrical nonlinearities. We observe that the CNT exhibits coexisting competing attractors, which lead to a versatile behavior. We examine the multistability in detail. The response is explored not only at low electrodynamic voltages, where the safe jump between attractors is ensured, but also at large electrodynamic excitation, where the inevitable escape (dynamic pull-in) becomes impending. We detect the theoretical boundaries of appearance and disappearance of the main attractors, which provide a complete description of the response.

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XIAO, A. HONGCHENG, B. DONGMEI YIN, and C. BAOMING LI. "Electrodynamic Response Study on Railgun Launcher Based on Electromechanical Coupling Model." In 31st International Symposium on Ballistics. Lancaster, PA: DEStech Publications, Inc., 2019. http://dx.doi.org/10.12783/ballistics2019/33096.

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Berger, J. D., S. Hallstein, C. Schneider, M. Hilpert, W. W. Rühle, H. M. Gibbs, G. Khitrova, F. Jahnke, S. W. Koch, and M. Oestreich. "Locking of the Stimulated Emission of a Microcavity Laser to the Electron Spin Precession Clock." In Quantum Optoelectronics. Washington, D.C.: Optica Publishing Group, 1997. http://dx.doi.org/10.1364/qo.1997.qthd.5.

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Spontaneous and stimulated emission properties of electronic states depend intimately on the electromagnetic environment to which they are coupled. Microcavities are of great fundamental and practical interest largely thanks to their ability to influence these emission properties. In the weak coupling regime of cavity quantum electrodynamics, a microcavity can either enhance or inhibit spontaneous emission, while the strong coupling regime is characterized by reversible vacuum Rabi oscillations. Stimulated emission properties are also greatly influenced by the nature of the intracavity field.

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Doi, Kentaro, and Satoyuki Kawano. "Theoretical Development of Predicted Iteration Method for Considering Electron Dynamics in Quantum Molecular Dynamics." In ASME-JSME-KSME 2011 Joint Fluids Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/ajk2011-36033.

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In the present study, a theoretical principle of molecular dynamics methods is developed, in which electron transfers are taken into account effectively based on quantum mechanics. In chemical reaction systems, electrodynamics should be considered in the molecular dynamics simulation because electron transfers play an important role. In this study, an effective procedure is proposed to treat time evolutions of electronic wavefunctions. In the procedure, electronic wavefunctions can be transformed to other spaces such as Mulliken atomic charges or electrostatic potentials, and then their time evolutions are coupled with the motions of ionic cores. The present method is applied to some chemical reaction systems, and charge transfer effects can be treated successfully in molecular dynamics simulations. The importance of a coupling method of molecular dynamics and electrodynamics is described.

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Krivets, A. S., I. A. Buriak, V. O. Zhurba, and A. A. Drozdenko. "Experimental Research of Electrodynamic Parameters of Screened Dielectric Waveguides with Distributed Coupling." In 2018 IEEE 8th International Conference Nanomaterials: Application & Properties (NAP). IEEE, 2018. http://dx.doi.org/10.1109/nap.2018.8914776.

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Huai, Zhouyu, Ming Zhang, Yu Zhu, Anlin Chen, Xin Li, and Leijie Wang. "Neural Network Inverse Based Omnidirectional Rotation Decoupling Control to the Electrodynamic Reaction Sphere." In ASME 2019 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/imece2019-11129.

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Abstract The electrodynamic reaction sphere is a novel actuator for the spacecraft attitude control subsystem. This paper proposes a neural network inverse based decoupling control scheme to actualize the omnidirectional rotation of the electrodynamic reaction sphere which has strong multivariable nonlinear coupling features due to the induction-based drive. And an integrated electromagnetic torque model of the reaction sphere is firstly derived from the electromagnetic field analysis and modified with the finite element analysis method. Then based on the integrated torque model, a back propagation feedforward neural network is constructed and trained to approach the inverse dynamics which transforms the original system into a pseudo-linear system. Furthermore, an additional PI controller is introduced to achieve good control performance against the unmodelled dynamics. Finally, the effectiveness of the proposed method is validated by simulations.

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