Gotowe bibliografie tematyczne / Atoms

Gotowa bibliografia na temat „Atoms”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 29 lipca 2024

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Artykuły w czasopismach na temat "Atoms"

Zhao, Qiang, Zheng Zhang, Yang Li i Xiaoping Ouyang. "First-Principles Study on Various Point Defects Formed by Hydrogen and Helium Atoms in Tungsten". Science and Technology of Nuclear Installations 2017 (2017): 1–9. http://dx.doi.org/10.1155/2017/6547939.

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The different point defects formed by two hydrogen atoms or two helium atoms in tungsten were investigated through first-principles calculation. The energetically favorable site for a hydrogen atom is tetrahedral interstitial site while substitutional site is the most preferred site for a helium atom. The formation energies of two hydrogen or helium atoms are determined by their positions, and they are not simply 2 times the formation energy of a single hydrogen or helium atom’s defect. After relaxation, two adjacent hydrogen atoms are away from each other while helium atoms are close to each other. The reasons for the interaction between two hydrogen or helium atoms are also discussed.

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Južnič, Stanislav. "Divisible Atoms Are Not Atoms". Acta Baltica Historiae et Philosophiae Scientiarum 6, nr 1 (10.06.2018): 55–96. http://dx.doi.org/10.11590/abhps.2018.1.03.

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Connerade, J.-P. "Quasi-Atoms and Super-Atoms". Physica Scripta 68, nr 2 (1.01.2003): C25—C32. http://dx.doi.org/10.1238/physica.regular.068ac0025.

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Brown, Nick. "Atoms". Archives of Disease in Childhood 107, nr 9 (18.08.2022): i. http://dx.doi.org/10.1136/archdischild-2022-324733.

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Donoghue, John. "Atoms". Physics Teacher 60, nr 6 (wrzesień 2022): 515. http://dx.doi.org/10.1119/5.0050341.

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Brown, Nick. "Atoms". Archives of Disease in Childhood 107, nr 10 (20.09.2022): i. http://dx.doi.org/10.1136/archdischild-2022-324834.

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Marcovitch, H. "Atoms". Archives of Disease in Childhood 86, nr 1 (1.01.2002): 1a—1. http://dx.doi.org/10.1136/adc.86.1.1-a.

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Marcovitch, H. "Atoms". Archives of Disease in Childhood 86, nr 2 (1.02.2002): 71a—71. http://dx.doi.org/10.1136/adc.86.2.71-a.

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Marcovitch, H. "Atoms". Archives of Disease in Childhood 86, nr 3 (1.03.2002): 141a—141. http://dx.doi.org/10.1136/adc.86.3.141-a.

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Marcovitch, H. "Atoms". Archives of Disease in Childhood 86, nr 4 (1.04.2002): 227a—227. http://dx.doi.org/10.1136/adc.86.4.227-a.

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Rozprawy doktorskie na temat "Atoms"

Nguyen, Thanh Long. "Study of dipole-dipole interaction between Rydberg atoms : toward quantum simulation with Rydberg atoms". Thesis, Paris 6, 2016. http://www.theses.fr/2016PA066695/document.

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La simulation quantique offre un moyen très prometteur pour comprendre les systèmes quantiques corrélés macroscopiques. De nombreuses plateformes expérimentales sont en cours d'élaboration. Les atomes de Rydberg sont particulièrement intéressants grâce à leur forte interaction dipolaire de cours portée. Dans notre manip, nous préparons et manipulons des ensembles d'atomes de Rydberg excités à partir d'un nuage atomique ultra-froid piégé magnétiquement sur une puce à atome supraconductrice. La dynamique de l'excitation est contrôlée par le processus d'excitation du laser. Le spectre d'énergie d'interaction atomique des N corps est mesuré directment par spectroscopie micro-onde. Dans cette thèse, nous développons un modèle Monte Carlo rigoureux qui nous éclaire sur le processus d'excitation. En utilisant ce modèle, nous discutons de la possibilité de réaliser des simulations quantiques du transport d'énergie sur une chaîne 1D d'atomes de Rydberg de faible moment angulaire. De plus, nous proposons une plateforme innovante pour la réalisation de simulations quantiques. Elle repose sur une approche révolutionnaire basée sur un ensemble d'atomes de Rydberg dont le temps de vie est extrêmement long, qui interagissent fortement et qui sont piégés par laser. Nous présentons les résultats de simulations numériques et nous discutons du large éventail de problèmes qui peuvent être traités avec le modèle proposé
Quantum simulation offers a highly promising way to understand large correlated quantum systems, and many experimental platforms are now being developed. Rydberg atoms are especially appealing thanks to their strong and short-range dipole-dipole interaction. In our setup, we prepare and manipulate ensembles of Rydberg atoms excited from an ultracold atomic cloud magnetically trapped above a superconducting chip. The dynamics of the Rydberg excitation can be controlled through the laser excitation process. The many-body atomic interaction energy spectrum is then directly measured through microwave spectroscopy. This thesis develops a rigorous Monte Carlo model that provides an insight into the excitation process. Using this model, we discuss a possibility to explore quantum simulations of energy transport in a 1D chain of low angular momentum Rydberg atoms. Furthermore, we propose an innovative platform for quantum simulations. It relies on a groundbreaking approach, based on laser-trapped ensemble of extremely long-lived, strongly interacting circular Rydberg atoms. We present intensive numerical results as well as discuss a wide range of problems that can be addressed with the proposed model

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Treutlein, Philipp. "Coherent manipulation of ultracold atoms on atom chips". Diss., kostenfrei, 2008. http://edoc.ub.uni-muenchen.de/9153/.

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Zuliani, Alexandre. "Vers la manipulation optique d'atomes ultra-froids d'ytterbium excités dans des états de Rydberg". Thesis, Université Paris-Saclay (ComUE), 2015. http://www.theses.fr/2015SACLS141/document.

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Les propriétés exacerbées des atomes de Rydberg ont permis d'étendre les possibilités offertes par les atomes froids dans la création de gaz d'atomes en très forte interaction, avec des applications notamment en simulations quantiques, dans la physique à N corps ou dans la réalisation de portes quantiques grâce au phénomène de blocage dipolaire. L'utilisation des atomes de Rydberg froids est cependant actuellement limitée par le fait qu'il n'est pas possible de continuer d'appliquer les techniques expérimentales de manipulation optique avec les atomes à un électron actif. L’attention de la communauté des atomes de Rydberg froids s’est donc récemment portée sur les atomes à deux électrons actifs qui offrent la possibilités, une fois l’un des deux électrons excité vers un état de Rydberg, de disposer d’un second électron optiquement actif qu’il va être possible de manipuler par laser. L’objectif de cette thèse est d’étendre les techniques de manipulation optique aux atomes à deux électrons actifs excités dans des états de Rydberg, dans le cas de l’atome d’ytterbium. Elle présente d’une part la conception et l’assemblage du dispositif expérimental permettant l’obtention d’une source d’atomes de Rydberg froids d’ytterbium. A terme, ce montage permettra la manipulation optique de ces atomes de Rydberg. D’autre part, elle présente le développement d’un modèle numérique implémentant la théorie du défaut quantique à plusieurs voies pour permettre la détermination théorique du spectre énergétique de l’ytterbium ainsi que son comportement sous l’effet de perturbations extérieures
The exacerbated properties of Rydberg atoms have extended the possibilities offered by cold atoms in creating atomic gases in very strong interaction with applications including quantum simulations in many-body physics or in achieving of quantum gates with the dipole blocking phenomenon. The use of cold Rydberg atoms is however currently limited by the fact that it is not possible to continue to apply the experimental techniques of optical manipulation with the atoms to an active electron. The attention of the Rydberg atoms cold community is recently focused on the two active electron atoms offering possibilities, once one of the two electrons excited to a Rydberg state, to provide a second optically active electron that it will be possible to manipulate with laser light.The objective of this thesis is to extend the optical manipulation techniques to atoms with two active electrons excited in Rydberg states, in the case of the ytterbium atom. It has on the one hand the design and assembly of the experimental apparatus for obtaining a source of cold Rydberg ytterbium atoms. Ultimately, this device will allow the optical manipulation of these Rydberg atoms. Furthermore, it presents the development of a numerical model that implements the multichannel quantum defect theory to the theoretical determination of the energy spectrum of ytterbium and its behavior under the influence of external perturbations

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Lefèvre, Grégoire. "Développement d’un interféromètre atomique en cavité pour le projet MIGA". Thesis, Bordeaux, 2019. http://www.theses.fr/2019BORD0063/document.

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Après plusieurs décennies de développement, l'interférométrie atomique est devenue un outil extrêmement performant pour mesurer des effets inertiels, tels que des accélérations et des rotations. De telles techniques sont maintenant envisagées pour une future génération de détecteurs d'ondes gravitationnelles afin de pousser les limites de l'état de l'art des détecteurs actuels. L'instrument MIGA (Matter-wave laser Interferometer Gravitation Antenna) couplera interférométrie atomique et optique pour étudier des perturbations du champ gravitationnel à basse fréquence (Hz et sub-Hz). Il consistera en un réseau de 3 interféromètres atomiques, simultanément interrogés par le champ électromagnétique résonnant au sein de deux cavités optiques de 150 m de long, en utilisant un ensemble d'impulsions de Bragg d'ordre π/2 - π - π/2. Des mesures gradiométriques permettront d'acquérir une forte immunité aux bruits sismique et newtonien, qui sont limitants pour les détecteurs terrestres optiques tels que LIGO et Virgo. Une expérience préliminaire est en développement au LP2N, à Talence (France), où un interféromètre est interrogé par deux cavités de 80 cm de long. Pour avoir une taille de faisceau suffisante afin d'interroger efficacement les atomes de 87Rb dans des cavités de cette longueur, nous utilisons une géométrie de cavité marginalement stable, constituée de deux miroirs plans situés à la focale d'une lentille biconvexe, où un mode gaussien de rayon de plusieurs mm peut résonner
After few decades of development, atom interferometry has become an extremely efficient tool for measuring inertial effects such as accelerations and rotations. Such techniques are now envisioned for a future generation of gravitational wave detectors to push further the limit of the current optical detectors. The Matter-Wave Laser Interferometer Gravitation Antenna (MIGA) instrument will couple atom and optical interferometry to study perturbations of the gravitational field at low-frequencies (Hz and sub-Hz). It will consist of an array of 3 atom interferometers, simultaneously interrogated by the light field resonating inside two 150 m long optical cavities, using a set of high order Bragg pulses π/2 - π - π/2. Gradiometric measurements allows a strong immunity to seismic and newtonian noises which limit optical ground-based detectors such as LIGO and Virgo. A preliminary experiment is being developed at the LP2N laboratory, in Talence (France), where a single atomic cloud is interrogated inside two 80 cm long cavities. In order to interrogate efficiently the 87Rb atoms, a gaussian beam with a radius of several mm resonating inside these cavities is required. This can be achieved by using a marginally stable cavity geometry, composed by two plane mirrors located in the focal planes of a biconvex lens

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Bade, Satyanarayana. "Propagation of atoms in a magnetic waveguide on a chip". Thesis, Paris 6, 2016. http://www.theses.fr/2016PA066718/document.

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Dans cette thèse, nous étudions la propagation des atomes dans un guide magnétique toroïdal, dans le but de développer un capteur inertiel. Ici, nous présentons différentes stratégies pour créer un guide sur une puce atomique pour un interférometre Sagnac atomique guidé. Nous avons mis au point trois solutions qui peuvent être realisé avec la même configuration des fils. Ils utilise la technique de modulation de courant avec un nouveau point de vue qui traite simultanément la problème de rugosité des fils et les pertes de Majorana dépendant du spin. L'effect de la propagation multimode des atomes dan le guide est aussi quantifié dans cette thèse. En utilisant un modèle simple, nous avons couvert les cas de la propagation de gaz non interactif ultra froids et thermique. Nous avons identifié les conditions operationelles pour realiser un interferometre à atomes froids avec une grande gamme dynamique, essentielle pour les application en navigation inertielle. Expérimentalement, cette thèse decrit la réalisation et la characterisation de la source atomes froids proche d'un substrat avec un dépôt d'or, ainsi que l'implémentation et la caracterisation des systèmes de détection
In this thesis we study the propagation of atoms in a magnetic toroidal waveguide, with the aim of developing an inertial sensor. Here, we present different strategies to create the waveguide on an atom chip for a guided Sagnac atom interferometer. We devised three solutions which can be achieved using the same wire configuration. They use the current modulation technique, from a new point of view, which simultaneously tackles the problem of wire corrugation and spin dependent Majorana atom losses. The effect of the multimode propagation of the atoms in the guide is also quantified in this thesis. Using a simple model, we covered the propagation of noninteracting ultracold and thermal gases. We identified the operating conditions to realize a cold atom interferometer with a large dynamic range essential for applications in inertial navigation. Experimentally, the thesis describes the realisation and characterisation of the cold atom source close to a gold coated substrate, as well as the implementation and the characterisation of the atom detection systems

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Blockley, Craig Andrew. "Quantum interactions of light and atoms: squeezing of light by atoms and cooling of atoms by light". Thesis, University of Auckland, 1993. http://hdl.handle.net/2292/1966.

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Light and atoms couple together via the electromagnetic interaction. The simplest form of this interaction is the electric dipole interaction, and in its quantised form it provides a useful starting point for the investigation of quantum effects in optics. Two examples of quantum noise manipulation of the light field due to interaction with atoms will be presented, as well as an analysis of a simple model for laser cooling of trapped atoms. The first example of quantum noise manipulation is the investigation of a quantum non-demolition measurement scheme based on a three-level atomic system in the ladder configuration. An effective two-level model of the atomic system is used, which enables the inclusion of spontaneous emission noise from the upper atomic level. The system is found to perform well, when detuned far from resonance. The second example is the treatment of squeezing in the intensity difference between two modes coupled by a three-level atomic system in the ladder configuration. The noise correlations are similar to those occurring in the optical parametric oscillator, and give rise to good squeezing when the system is well detuned from the intermediate level. The simple model of laser cooling consists of a single two-level atom with quantised centre-of-mass motion constrained to move in a one-dimensional harmonic potential while interacting with a single-mode classical travelling light field. It is shown that there is an analogy between this model and the Jaynes-Cummings model. This gives rise to interesting coherent effects including quantum collapses and revivals in the atomic inversion. Sideband cooling occurs for this model when the light field is tuned to the atom's first lower vibrational sideband. The strong sideband and Lamb-Dicke perturbation regimes are defined. Analytic results have previously been obtained for the latter regime, but we carry out a numerical investigation of the steady state and time evolution behaviour in the former regime. Differences in the behaviour in the two regimes are discussed. Finally the possibility of observing quantum jumps between trap levels is discussed.

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Ribeiro, Sofia. "Atom-surface interactions with Rydberg atoms : an application to hybrid systems". Thesis, Imperial College London, 2013. http://hdl.handle.net/10044/1/24166.

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This thesis focuses on theoretical quantum optics, with special emphasis on developing protocols in which engineered vacuum forces enable one to construct hybrid systems. In these systems, atoms are combined with solid-state devices in order to take advantage of their unique properties such as long coherence times of atoms and flexibility, tunability, scalability, and fast response offered by solid-state systems. Special attention is given to the study of atom-surface interactions with Rydberg atoms, where exact Fano-type diagonalization of the interaction Hamiltonian is obtained showing that, not only do Rydberg atoms suffer energy shifts, the presence of a surface leads to an alteration and admixture of the unperturbed eigenstates. Of particular interest are dispersion forces on graphene systems. We investigate whether and under which circumstances the Casimir-Polder potential between an atom and a graphene-substrate system is dominated by the interaction with graphene such that the effect of the substrate does not play an important role. We also explore the possibility to create a setup where dispersion forces could be use to bend a graphene sheet. Placing an atom close, at distances of a few hundred nanometers, to a free-standing graphene membrane we show that temporal changes in the atomic state change the Casimir-Polder interaction, thereby leading to the creation of a backaction force in the graphene sheet. Finally, we look at nonlinear atom--surface coupling processes with the aim of proposing a hybrid quantum circuit device in which individual field-excitations can be transferred between atoms and surface polaritons on demand. Deeper investigations of nonlinear processes reveal the existence of a sum rule for two-photon spontaneous decay rates that can be simply understood as a redistribution of photonic modes across the frequency spectrum where the total integrated number of modes is still conserved.

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Palmer, Adam J. "A UV Free Source of Metastable Neon Atoms for Atom Lithography". Thesis, Griffith University, 2011. http://hdl.handle.net/10072/367006.

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A high flux metastable Neon atomic beam was designed and characterised. Atom optical enhancement of the beam using a two-dimensional optical collimator, novel two beam Zeeman slower and hexapole magnetic guide was performed to produce a UV-free metastable flux of (4.35 × 109 ± 4 × 107) atoms s−1. Investigations of several resists for neutral atom lithography were undertaken. A quantitative investigation of the wetting properties of ethanethiol (ET) and dodecanethiol (DDT) self-assembled monolayers (SAM’s) exposed to various metastable dosages was carried out. A mechanism for the poor lithographic patterning using ET was proposed and the negative contrast patterning observed for this SAM was similar to those observed for bare gold substrates and were attributed to mechanical pump oil (MPO) contamination resists. Negative patterned resists were used to produce 7.5 μm iron dots on a silicon substrate via neutral atom lithography. This scheme was found to be very robust and free from the laser cooling issues of alternative direct depositional schemes. Numerical simulations have shown that two dimensional arrays of magnetic nanodots may be produced this way, paving the way for a magnetic storage option with a density of " 0.1 Gbit mm−2.
Thesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Biomolecular and Physical Sciences
Science, Environment, Engineering and Technology
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Piotrowicz, Michal J. "Ultracold Rydberg atoms". Thesis, Open University, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.530495.

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Holland, Dominic John Martin. "Cracks and atoms /". Digital version accessible at:, 1999. http://wwwlib.umi.com/cr/utexas/main.

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Książki na temat "Atoms"

Compagno, G. Atom-field interactions and dressed atoms. Cambridge: Cambridge University Press, 1995.

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Stewart, Melissa. Atoms. Minneapolis, Minn: Compass Point Books, 2003.

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Oxlade, Chris. Atoms. Oxford: Heinemann Library, 2002.

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Dmitry, Budker, i Rochester Simon, red. Optically polarized atoms: Understanding light-atom interactions. Oxford: New York, 2010.

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Stille, Darlene R. Atoms & Molecules. Mankato: Compass Point Books, 2007.

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Natalie, Goldstein, red. Discovering atoms. New YorK: Rosen Pub., 2012.

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Koolen, Armand Eugène Albert. Dissipative atom optics with cold metastable helium atoms. Eindhoven: Technische Universiteit Eindhoven, 2000.

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Lisitsa, Valery S. Atoms in Plasmas. Berlin, Heidelberg: Springer Berlin Heidelberg, 1994.

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Lisitsa, V. S. Atoms in plasmas. Berlin: Springer-Verlag, 1994.

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Happer, William, Yuan-Yu Jau i Thad Walker. Optically Pumped Atoms. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2010. http://dx.doi.org/10.1002/9783527629503.

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Części książek na temat "Atoms"

Tamvakis, Kyriakos. "Atoms". W Undergraduate Texts in Physics, 273–95. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-22777-7_15.

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Manini, Nicola. "Atoms". W Introduction to the Physics of Matter, 11–70. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-14382-8_2.

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Galindo, Alberto, i Pedro Pascual. "Atoms". W Quantum Mechanics II, 268–97. Berlin, Heidelberg: Springer Berlin Heidelberg, 1991. http://dx.doi.org/10.1007/978-3-642-84129-3_7.

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Lindholm, E., i L. Åsbrink. "Atoms". W Lecture Notes in Chemistry, 47–75. Berlin, Heidelberg: Springer Berlin Heidelberg, 1985. http://dx.doi.org/10.1007/978-3-642-45595-7_5.

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Manini, Nicola. "Atoms". W Introduction to the Physics of Matter, 11–70. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-57243-3_2.

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Calle, Carlos I. "Atoms". W Superstrings and Other Things, 93–104. Third edition. | Boca Raton : CRC Press, 2020.: CRC Press, 2020. http://dx.doi.org/10.1201/9780429431029-10.

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Weigold, Erich, i Ian E. McCarthy. "Atoms". W Electron Momentum Spectroscopy, 141–77. Boston, MA: Springer US, 1999. http://dx.doi.org/10.1007/978-1-4615-4779-2_5.

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Givant, Steven. "Atoms". W Undergraduate Texts in Mathematics, 117–26. New York, NY: Springer New York, 2009. http://dx.doi.org/10.1007/978-0-387-68436-9_14.

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Cencini, Massimo, Andrea Puglisi, Davide Vergni i Angelo Vulpiani. "Atoms". W A Random Walk in Physics, 9–13. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-72531-0_3.

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Khene, Samir. "Atoms". W Undergraduate Lecture Notes in Physics, 1–132. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-87742-2_1.

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Streszczenia konferencji na temat "Atoms"

Hinds, E. A. "Cold Atoms on Atom Chips". W Laser Science. Washington, D.C.: OSA, 2008. http://dx.doi.org/10.1364/ls.2008.ltug2.

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Hinds, E. A. "Cold atoms on atom chips". W International Quantum Electronics Conference, 2005. IEEE, 2005. http://dx.doi.org/10.1109/iqec.2005.1561104.

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Camposeo, A., F. Cervelli, F. Tantussi, M. Lindholdt, F. Fuso, M. Allegrini i E. Arimondo. "Atom nanolithography with cold cesium atoms". W 2003 European Quantum Electronics Conference. EQEC 2003 (IEEE Cat No.03TH8665). IEEE, 2003. http://dx.doi.org/10.1109/eqec.2003.1314152.

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Aspect, Alain. "Laser Manipulation of Atoms". W The European Conference on Lasers and Electro-Optics. Washington, D.C.: Optica Publishing Group, 1994. http://dx.doi.org/10.1364/cleo_europe.1994.tutorial.b.

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Momentum exchange between atoms and photons allow laser physicists to control atomic motion. It is possible to decelerate and/or focus an atomic beam, to stop it. The average velocity of the almost stopped atoms can be decreased to very small values close to or even below the one photon recoil velocity V R = ħk L /M, corresponding to temperatures in the microkelvin range or below. Laser manipulation of atoms is also essential for the recently developing field of atom optics.

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Fancher, C. T., A. R. Ziltz, A. J. Pyle, M. K. Ivory i S. Aubin. "Atom Chip-Based Microwave Potentials for Ultracold Atoms". W Laser Science. Washington, D.C.: OSA, 2014. http://dx.doi.org/10.1364/ls.2014.lth1i.7.

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Müller, J. H., D. Bettermann, V. Rieger, F. Ruschewitz, K. Sengstock, U. Sterr, M. Christ i in. "Atom Optics and Interferometry with Laser Cooled Atoms". W ATOMIC PHYSICS 14: Fourteenth International Conference on Atomic Physics. AIP, 1994. http://dx.doi.org/10.1063/1.2946009.

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Hufnagel, Christoph, Tetsuya Mukai i Fujio Shimizu. "Trapping Atoms with a Persistent Supercurrent Atom Chip". W 2007 European Conference on Lasers and Electro-Optics and the International Quantum Electronics Conference. IEEE, 2007. http://dx.doi.org/10.1109/cleoe-iqec.2007.4386720.

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Desheng Lu, Bin Wang, Tang Li i Liang Liu. "Space cold atom clock with counter-propagating atoms". W 2009 Joint Meeting of the European Frequency and Time Forum (EFTF) and the IEEE International Frequency Control Symposium (FCS). IEEE, 2009. http://dx.doi.org/10.1109/freq.2009.5168345.

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Bergeman, Thomas, i Harold Metcalf. "Magnetic trapping of neutral atoms". W International Laser Science Conference. Washington, D.C.: Optica Publishing Group, 1986. http://dx.doi.org/10.1364/ils.1986.wf6.

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Magnetic trapping of laser-cooled neutral atoms has been demonstrated at NBS and is progressing in other laboratories. Confinement of any object requires exchanging kinetic for potential energy, and for neutral atoms, this necessarily derives from shifts of internal energy levels. This is implemented through the force experienced by the atomic magnetic moment in a carefully designed, highly inhomogeneous field. Since magnetic fields of convenient strength can shift atomic energy levels by only a few gigahertz (temperature ≌ 0.1 K), neutral atom traps are very shallow and must be loaded with very cold atoms. We present some motivations for using magnetic traps and then discuss the constraints and optimal configurations of various arrangements. For example, no trap can be isotropic. Next we discuss both the classical and quantum mechanical motions of trapped atoms. These motions are important for at least two reasons: First, several schemes under study for further cooling depend on knowing the position and velocity of the atoms, as well as the vector field at each point along the orbit. Second, magnetic traps depend on the atomic moment remaining aligned with the field as the atom orbits in the trap, and this precludes rapid motion through a low-field region.

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Ivanchenko, G., A. Ten, M. Butenko i N. Kuzmin. "THE MODELING OF VIBRATION PROPERTIES IN THE HYDROGENATED DIAMOND-LIKE NANOFLAKES". W Mathematical modeling in materials science of electronic component. LCC MAKS Press, 2022. http://dx.doi.org/10.29003/m3100.mmmsec-2022/164-167.

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In this paper, the vibrational spectrum of diamane [1] is calculated within the framework of Hamilton's formalism. The geometric model of the diamane is represented as a two-layer graphene, but each C-atom has an sp3 hybridization of external electronic orbitals. The carbon atoms of one of the graphene sublattices are covalently bound to the atoms of the second graphene layer, and the outer hydrogen atoms are covalently attached to the atoms of the second sublattice. A diamane unit cell contains two carbon atoms and one hydrogen atom. When constructing the model, the deformation of the graphene plane as a result of the hydrogen atoms addition to it and the change in the hybridization of the external electronic orbitals of carbon atoms from sp2 to sp3 were taken into account. The interaction between hydrogen atoms was not taken into account.

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Raporty organizacyjne na temat "Atoms"

Lin, C. C. Electron Excitation of Atoms and the Stretched Atom States. Fort Belvoir, VA: Defense Technical Information Center, grudzień 1998. http://dx.doi.org/10.21236/ada368774.

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Buden, D. Atoms for space. Office of Scientific and Technical Information (OSTI), październik 1990. http://dx.doi.org/10.2172/6295771.

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Ків, Арнольд Юхимович, Володимир Миколайович Соловйов i Татьяна Ивановна Максимова. Effect of Al atom forcing out by Si in Al-Si solid solutions. Latvian Transport Development and Education Association, 2000. http://dx.doi.org/10.31812/0564/1141.

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It is shown by computer simulation of the Al-Si solid solution that at the first stages of Si precipitates formation the small Si clusters arise in the tetrahedral configurations. This process is accompanied by the effect of Al atom forcing out from the lattice site by one of the Si atoms of nuclei.

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Hau, Lene. Optics With Cold Atoms. Fort Belvoir, VA: Defense Technical Information Center, sierpień 2004. http://dx.doi.org/10.21236/ada428724.

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Behbahani, Siavosh R., Martin Jankowiak, Tomas Rube i Jay G. Wacker. Nearly Supersymmetric Dark Atoms. Office of Scientific and Technical Information (OSTI), sierpień 2011. http://dx.doi.org/10.2172/1022582.

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Weiss, Morton S. Tau Electron Atoms At RHIC. Office of Scientific and Technical Information (OSTI), październik 1986. http://dx.doi.org/10.2172/1118869.

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Kunselman, R. Exotic atoms. Technical progress report. Office of Scientific and Technical Information (OSTI), listopad 1994. http://dx.doi.org/10.2172/10195713.

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Gallaway, J. Clusters of Transition Metal Atoms. Fort Belvoir, VA: Defense Technical Information Center, styczeń 1988. http://dx.doi.org/10.21236/ada191265.

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Gallagher, T. F. Structure Dynamics of Excited Atoms. Fort Belvoir, VA: Defense Technical Information Center, marzec 1988. http://dx.doi.org/10.21236/ada198147.

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Flannery, M. R. Collision Dynamics With Stretched Atoms. Fort Belvoir, VA: Defense Technical Information Center, styczeń 1999. http://dx.doi.org/10.21236/ada361186.

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