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Dissertations / Theses on the topic 'Casimir effect'

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Published: 4 June 2021

Last updated: 25 July 2025

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1

Lang, Andrew. "The casimir effect /." free to MU campus, to others for purchase, 1998. http://wwwlib.umi.com/cr/mo/fullcit?p9904856.

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2

Holmes, Christopher David. "Acoustic Casimir effect." Monterey, California. Naval Postgraduate School, 1997. http://hdl.handle.net/10945/7844.

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In 1948, Hendrick Brugt Gerhard Casimir predicted that two closely spaced uncharged conducting plates in vacuum would be mutually attracted. This attractive force is an indirect manifestation of the quantum electromagnetic zero point field (ZPF). When the indirect manifestations of the ZPF are interpreted as due to radiation pressure, acoustic noise can provide an excellent analog to investigate the Casimir effect as well as other effects due to the ZPF. Force measurements between two parallel plates are performed in an acoustic chamber with a broadband noise spectrum within a 5-15 kHz band an

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3

Jacobs, David M. "Casimir Localization." Case Western Reserve University School of Graduate Studies / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=case1396608069.

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4

Rypestøl, Marianne. "Casimir effect in Randall-Sundrummodels." Thesis, Norwegian University of Science and Technology, Department of Physics, 2009. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-6353.

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5

Noto, Antonio. "Non-equilibrium Casimir interactions : from dynamical to thermal effects." Thesis, Montpellier, 2016. http://www.theses.fr/2016MONTT279/document.

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Dans cette thèse, après une introduction où nous présentons brièvement la physique des forces de Casimir, nous montrons nos résultats obtenus pendant le doctorat. D'abord, nous montrons notre travail sur les interactions de van der Waals / Casimir-Polder lorsque le système est dans une configuration hors équilibre à cause du mouvement uniformément accéléré des atomes. Nous étudions le système de deux atomes uniformément accélérés dans le vide quantique quand ils sont dans leur état fondamental ou dans un état corrélé (un atome excité et un atome dans son état fondamental). Nous analysons ce sy

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6

Haakh, Harald Richard. "Cavity QED with superconductors and its application to the Casimir effect." Master's thesis, Universität Potsdam, 2009. http://opus.kobv.de/ubp/volltexte/2009/3256/.

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Diese Diplomarbeit untersucht den Casimir-Effekt zwischen normal- und supraleitenden Platten über einen weiten Temperaturbereich, sowie die Casimir-Polder-Wechselwirkung zwischen einem Atom und einer solchen Oberfläche. Hierzu wurden vorwiegend numerische und asymptotische Rechnungen durchgeführt. Die optischen Eigenschaften der Oberflächen werden dann aus dielektrischen Funktionen oder optischen Leitfähigkeiten erhalten. Wichtige Modellen werden vorgestellt und insbesondere im Hinblick auf ihre analytischen und kausalen Eigenschaften untersucht. Es wird vorgestellt, wie sich die Casimir-Energ

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7

Hassan, Arkan Mahmood. "Dynamical Casimir Effect Using Two Photon Absorber." Miami University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=miami1533948476369766.

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8

van, Caspel Moos. "The topological Casimir effect on a torus." Thesis, University of British Columbia, 2013. http://hdl.handle.net/2429/44948.

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The conventional Casimir effect manifests itself as a quantum mechanical force between two plates, that arises from the quantization of the electromagnetic field in the enclosed vacuum. In this thesis the existence is discussed of an extra, topological term in the Casimir energy at finite temperatures. This topological Casimir effect emerges due to the nontrivial topological features of the gauge theory: the extra energy is the result of tunneling transitions between states that are physically the same but topologically distinct. It becomes apparent when examining, for instance, periodic bound

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9

McCutcheon, Robert A. "Hybrid Optomechanics and the Dynamical Casimir Effect." Miami University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=miami1501191323617929.

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10

Fialkovskiy, Ignat. "Efeito Casimir e as propriedades óticas do grapheno." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/43/43134/tde-11032013-151501/.

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Este trabalho é dedicado à investigação de diferentes aspectos da física de monocamadas de grafeno suspenso e epitaxial. A descrição do grafeno é baseada no modelo quase-relativístico de Dirac. Isso permite a aplicação dos métodos da Teoria Quântica de Campos (TQC) na investigação dos efeitos de interação entre o grafeno e o campo eletromagnético (EM). Usando o formalismo de integral de trajetória, nós formulamos uma teoria efetiva do campo EM na presença de monocamadas de grafeno. Esta teoria é governada pelo operador de polarização das quase-partículas de Dirac. Dois fenômenos importantes sã

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11

Mackrory, Jonathan. "The Worldline Method for Electromagnetic Casimir Energies." Thesis, University of Oregon, 2017. http://hdl.handle.net/1794/22664.

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The Casimir effect refers to the primarily attractive force between material bodies due to quantum fluctuations in the electromagnetic field. The Casimir effect is difficult to calculate in general, since it is sensitive to the exact shapes of the bodies and involves contributions from all frequencies. As a result, calculating the Casimir effect between general bodies usually requires a numerical approach. The worldline method computes Casimir energies by creating an ensemble of space-time paths corresponding to a virtual particle interacting with the bodies. This method was originally dev

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12

Cho, Sung Nae. "Casimir Force in Non-Planar Geometric Configurations." Diss., Virginia Tech, 2004. http://hdl.handle.net/10919/11156.

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The Casimir force for charge-neutral, perfect conductors of non-planar geometric configurations have been investigated. The configurations were: (1) the plate-hemisphere, (2) the hemisphere-hemisphere and (3) the spherical shell. The resulting Casimir forces for these physical arrangements have been found to be attractive. The repulsive Casimir force found by Boyer for a spherical shell is a special case requiring stringent material property of the sphere, as well as the specific boundary conditions for the wave modes inside and outside of the sphere. The necessary criteria in detecting Bo

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13

Le, Cunuder Anne. "Étude expérimentale des forces de Casimir." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSEN007/document.

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L'étude des fluctuations dans les milieux confinés constitue un domaine de recherche très récent, que ce soit du point de vue théorique ou expérimental. Afin d'analyser le rôle du confinement sur les propriétés des fluctuations de densité dans un mélange binaire, nous avons développé un système de mesure d'une grande sensibilité, où l'intensité des fluctuations et leur longueur de corrélation peuvent être amplifiées. L'idée consiste à travailler proche du point critique d'une transition de phase de démixion d'un mélange binaire. En effet, la longueur de corrélation augmente exponentiellement l

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14

Azari, Arash. "Casimir effect in presence of dielectric and metallic materials." Thesis, University of Sheffield, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.531132.

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15

Klatt, Juliane [Verfasser], and Stefan Yoshi [Akademischer Betreuer] Buhmann. "The Casimir-Polder effect and quantum friction across timescales." Freiburg : Universität, 2017. http://d-nb.info/115468184X/34.

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16

Messineo, Giuseppe. "The MIR experiment: quantum vacuum and dynamical Casimir effect." Doctoral thesis, Università degli studi di Trieste, 2011. http://hdl.handle.net/10077/4572.

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2009/2010<br>This thesis concerns one of the few low energy experimental efforts aiming to test Quantum Electrodynamics. The experiment MIR (Motion Induced Radiation) studies the quantum vacuum in the presence of accelerated boundaries. According to Quantum Electrodynamics, a non-uniformly accelerated mirror in vacuum feels a friction force due to the interaction with the vacuum photons. As a consequence, real photons are produced in the process, which is known as dynamical Casimir effect. The radiated energy is emitted at the expense of the mechanical energy of the mirror. The effect has neve

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17

Woolf, David Nathaniel. "Near-Field Optical Forces: Photonics, Plasmonics and the Casimir Effect." Thesis, Harvard University, 2013. http://dissertations.umi.com/gsas.harvard:10812.

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The coupling of macroscopic objects via the optical near-field can generate strong attractive and repulsive forces. Here, I explore the static and dynamic optomechanical interactions that take place in a geometry consisting of a silicon nanomembrane patterned with a square-lattice photonic crystal suspended above a silicon-on-insulator substrate. This geometry supports a hybridized optical mode formed by the coupling of eigenmodes of the membrane and the silicon substrate layer. This system is capable of generating nanometer-scale deflections at low optical powers for membrane-substrate gaps

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18

Scardicchio, Antonello. "An optical approximation to the Casimir effect and related topics." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/36811.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 2006.<br>Includes bibliographical references (leaves 181-188).<br>In this thesis, I have studied the dependence of the Casimir force between neutral conductors on their shapes. After reducing the problem to that of finding the density of states of' an appropriate hamiltonian I studied it by using semiclassical methods. Some exemplary geometries of interest for the experiments are studied in detail.<br>by Antonello Scardicchio.<br>Ph.D.

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19

NOSARI, GABRIELE. "Local approach to Casimir effect in axiomatic quantum field theory." Doctoral thesis, Università degli studi di Pavia, 2017. http://hdl.handle.net/11571/1203292.

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20

Borjan, Zoran. "Application of local functional theory to surface critical phenomena." Thesis, University of Bristol, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.302201.

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21

Obousy, Richard K. Cleaver Gerald B. "Investigation into compactifed dimensions Casimir energies and phenomenological aspects /." Waco, Tex. : Baylor University, 2008. http://hdl.handle.net/2104/5261.

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22

Ghadirian, Bahman. "A new regularization procedure for calculating the Casimir energy." Thesis, View thesis, 2008. http://handle.uws.edu.au:8081/1959.7/24942.

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This thesis deals with the concepts of a very interesting phenomenon in quantum physics, the Casimir effect. Here the effect is investigated in detail and its importance to other areas of physics is analysed. The Casimir effect is produced by disturbing the vacuum energy when material boundaries or background fields are introduced in the vacuum. The usual approach to this effect is the vacuum fluctuation that has been studied in the past in relation to the discussion of the zero-point energy as a result of the field resemblance to the quantum harmonic oscillators, where residual ground state e

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23

Colombaro, Ivano. "Dynamical Casimir effect and the structure of vacuum in quantum field theory." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/10382/.

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Some of the most interesting phenomena that arise from the developments of the modern physics are surely vacuum fluctuations. They appear in different branches of physics, such as Quantum Field Theory, Cosmology, Condensed Matter Physics, Atomic and Molecular Physics, and also in Mathematical Physics. One of the most important of these vacuum fluctuations, sometimes called "zero-point energy", as well as one of the easiest quantum effect to detect, is the so-called Casimir effect. The purposes of this thesis are: - To propose a simple retarded approach for dynamical Casimir effect, thus a

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24

Ghadirian, Bahman. "A new regularization procedure for calculating the Casimir energy." View thesis, 2008. http://handle.uws.edu.au:8081/1959.7/24942.

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Thesis (Ph.D.)--University of Western Sydney, 2008.<br>A thesis submitted to the University of Western Sydney, College of Health and Science, School of Biomedical and Health Sciences in fulfilment of the requirements for the degree of Doctor of Philosophy. Includes bibliographical references.

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25

Мороз, Ю. В. "Вперше виміряна сила відштовхування в ефекті Казимира-Ліфшиця". Thesis, Сумський державний університет, 2013. http://essuir.sumdu.edu.ua/handle/123456789/41113.

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Квантова механіка пророкує, що на відстанях порядку нанометра між тілами повинна спостерігатися сила тяжіння, яка за своїми параметрами відмінна від сили всесвітнього тяжіння Ньютона. Таке явище називають ефектом Казимира. Крім того при певних умовах тяжіння тіл може змінитися на їх відштовхування. В такому випадку говорять про об'єднаний ефект Казимира-Лифшиця.

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26

Canaguier-Durand, Antoine. "Multipolar scattering expansion for the Casimir effect in the sphere-plane geometry." Paris 6, 2011. http://www.theses.fr/2011PA066246.

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Nous évaluons l’interaction de Casimir entre un miroir plan et un miroir sphérique, à température arbitraire, en tenant compte de la réflexion imparfaite. Cela nous permet d’étudier la riche dépendance à la géométrie de l’effet Casimir, et d’estimer l’erreur faite par l’approximation de proximité (PFA), communément utilisée pour cette configuration sphère-plan qui est celle des expériences. Pour cette évaluation nous appliquons la méthode de diffusion, basée sur la théorie des réseaux optiques, à la géométrie sphère-plan. La température est prise en compte par la formule de Matsubara. La réfle

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27

Chiu, Hsiang-Chih. "Demostration of non-additivity ans asymmetry in the lateral Casimir force." Diss., UC access only, 2009. http://proquest.umi.com/pqdweb?index=41&did=1905738741&SrchMode=1&sid=2&Fmt=7&retrieveGroup=0&VType=PQD&VInst=PROD&RQT=309&VName=PQD&TS=1270142776&clientId=48051.

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Thesis (Ph. D.)--University of California, Riverside, 2009.<br>Includes abstract. Includes bibliographical references (leaves 146-154). Issued in print and online. Available via ProQuest Digital Dissertations.

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28

Droujinina, Viola. "On quantum reflection and the Casimir effect application to atom surface scattering /." [S.l. : s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=96859607X.

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29

Simpson, William M. R. "Surprises in theoretical Casimir physics : quantum forces in inhomogeneous media." Thesis, University of St Andrews, 2014. http://hdl.handle.net/10023/6338.

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This thesis considers the problem of determining Casimir-Lifshitz forces in inhomogeneous media. The ground-state energy of the electromagnetic field in a piston-geometry is discussed. When the cavity is empty, the Casimir pressure on the piston is finite and independent of the small-scale physics of the media that compose the mirrors. However, it is demonstrated that, when the cavity is filled with an inhomogeneous dielectric medium, the Casimir energy is cut-off dependent. The local behavior of the stress tensor commonly used in calculations of Casimir forces is also determined. It is shown

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30

Fermi, D. "A FUNCTIONAL ANALYTIC FRAMEWORK FOR LOCAL ZETA REGULARIZATION AND THE SCALAR CASIMIR EFFECT." Doctoral thesis, Università degli Studi di Milano, 2016. http://hdl.handle.net/2434/360961.

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It is developed a functional analytic framework allowing to formulate a rigorous implementation of zeta regularization for a canonically quantized scalar field, living on an arbitrary spatial domain and interacting with a classical background potential. This framework relies on the construction of an infinite scale of graded Hilbert spaces associated to the real powers of some given, positive self-adjoint operator. When the latter is a Schr\"odinger-type differential operator, this formulation provides a natural language to study the integral kernels related to a large class of operators, fulf

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31

Maia, Clóvis Achy Soares [UNESP]. "Fluxos e densidades de energia negativa em teoria quântica de campos." Universidade Estadual Paulista (UNESP), 2005. http://hdl.handle.net/11449/91855.

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Made available in DSpace on 2014-06-11T19:25:30Z (GMT). No. of bitstreams: 0 Previous issue date: 2005-03Bitstream added on 2014-06-13T20:33:11Z : No. of bitstreams: 1 maia_cas_me_ift.pdf: 968895 bytes, checksum: 0a94d217b227cfdce0aee0d507acf35f (MD5)<br>Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)<br>Sabe-se já há algum tempo que a Teoria Quântica de Campos permite violações das Condições Clássicas de Energia na forma de densidades e fluxos de energia negativa. Um exemplo contundente é o efeito Casimir, onde o estado de vácuo do campo eletromagnético entre duas placas metál

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32

Ullio, Ícaro Joshua Morales. "Consequências da violação da simetria de Lorentz no Efeito Casimir." Universidade Federal da Paraíba, 2015. http://tede.biblioteca.ufpb.br:8080/handle/tede/8000.

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Submitted by Maike Costa (maiksebas@gmail.com) on 2016-03-16T11:18:29Z No. of bitstreams: 1 arquivototal.pdf: 836345 bytes, checksum: 048933d0a290c347efd2fa4764bbcf63 (MD5)<br>Made available in DSpace on 2016-03-16T11:18:29Z (GMT). No. of bitstreams: 1 arquivototal.pdf: 836345 bytes, checksum: 048933d0a290c347efd2fa4764bbcf63 (MD5) Previous issue date: 2015-02-20<br>In this Dissertation we’ll consider a scalar field theory where the breaking of Lorentz symmetry is present. Basically we will adopt the Ho˘rava-Lifshtz theory. We’ll study the modifications that an anisotropy in space-time

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33

Laurent, Justine. "Mesures de la force de Casimir à basse température." Phd thesis, Grenoble, 2010. http://www.theses.fr/2010GRENY070.

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La force de Casimir, du nom du physicien qui prédit en 1948 l'existence de cette force attractive dans la configuration idéale de deux miroirs parfaits, plans et parallèles, est d'origine purement quantique. Elle résulte de l'existence des fluctuations quantiques de point zéro du champ électromagnétique et joue un rôle prépondérant dans le fonctionnement des nanosystèmes mécaniques en cours de développement et qui pourraient dans les années futures révolutionner l'industrie de la microélectronique. Pourtant, les effets correctifs liés à la conductivité des surfaces ou à l'empilement diélectriq

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34

Baumgärtel, C., and Martin Tajmar. "The Planck Constant and the Origin of Mass due to a Higher Order Casimir Effect." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2018. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-237708.

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The Planck constant is one of the most important constants in nature, as it describes the world governed by quantum mechanics. However, it cannot be derived from other natural constants. We present a model from which it is possible to derive this constant without any free parameters. This is done utilizing the force between two oscillating electric dipoles described by an extension of Weber electrodynamics, based on a gravitational model by Assis. This leads not only to gravitational forces between the particles but also to a newly found Casimir-type attraction. We can use these forces to calc

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35

Espinosa, Jorge D. "De-wetting of cobalt thin films on sapphire." Morgantown, W. Va. : [West Virginia University Libraries], 2007. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=5314.

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Thesis (Ph. D.)--West Virginia University, 2007.<br>Title from document title page. Document formatted into pages; contains ix, 106 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 102-105).

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36

Reis, João Lucas Miqueleto. "Modelos análogos de gravitação semi-clássica usando circuitos supercondutores." reponame:Repositório Institucional da UFABC, 2017.

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Orientador: Prof. Dr. André Gustavo Scagliusi Landulfo<br>Dissertação (mestrado) - Universidade Federal do ABC, Programa de Pós-Graduação em Física, 2017.<br>Essa dissertação de mestrado tem por objetivos estudar e discutir as bases matemáticas e conceituais da teoria quântica de campos em espaços-tempos curvos (TQCEC) e analisar como podemos simular efeitos de TQCEC, como o efeito Hawking e o efeito Casimir dinâmico, usando circuitos supercondutores. Após o estudo do formalismo da relatividade geral e da TQCEC, é feita uma revisão sobre os modelos análogos de gravitação em fluidos. Em seguida

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37

Hartmann, Michael [Verfasser], and Gert-Ludwig [Akademischer Betreuer] Ingold. "Casimir effect in the plane-sphere geometry: Beyond the proximity force approximation / Michael Hartmann ; Betreuer: Gert-Ludwig Ingold." Augsburg : Universität Augsburg, 2018. http://d-nb.info/1179089952/34.

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Maia, Clóvis Achy Soares. "Fluxos e densidades de energia negativa em teoria quântica de campos /." São Paulo : [s.n.], 2005. http://hdl.handle.net/11449/91855.

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Orientador: George E. A. Matsas<br>Banca: Élcio Abdalla<br>Banca: Vitório Alberto De Lorenci<br>Resumo: Sabe-se já há algum tempo que a Teoria Quântica de Campos permite violações das Condições Clássicas de Energia na forma de densidades e fluxos de energia negativa. Um exemplo contundente é o efeito Casimir, onde o estado de vácuo do campo eletromagnético entre duas placas metálicas possui densidade de energia negativa. Porém, se as leis da física não colocassem restrições sobre tais violações das Condições de Energia, aparentemente seria possível usar energias negativas para, por exemplo, pr

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Nefedchenko, Vasyl Fedorovych, Василий Федорович Нефедченко, Василь Федорович Нефедченко та О. Тверезовська. "Ефект Казимира". Thesis, Видавництво СумДУ, 2008. http://essuir.sumdu.edu.ua/handle/123456789/4171.

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В останні роки значно зріс інтерес до фізичних явищ, відомих під загальною назвою “ефект Казимира”. Сутність цього ефекту полягає в поляризації вакууму квантованих полів, яка виникає внаслідок зміни спектра вакуумних коливань при обмеженні об’єму квантування або при відмінності топології простору від евклідової. При цитуванні документа, використовуйте посилання http://essuir.sumdu.edu.ua/handle/123456789/4171

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Pavlov, Andrei [Verfasser], den Brink Jeroen [Akademischer Betreuer] van, den Brink Jeroen [Gutachter] van, et al. "Phonon-mediated Casimir effect / Andrei Pavlov ; Gutachter: Jeroen van den Brink, Werner Skrotzki, Eduard Lavrov, Steffen Sykora ; Jeroen van den Brink, Dmitri Efremov." Dresden : Technische Universität Dresden, 2019. http://d-nb.info/1227202105/34.

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Büscher, Rauno. "Casimir forces and geometry." [S.l.] : [s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=976592533.

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Bellouvet, Maxime. "Condensation de Bose-Einstein et simulation d’une méthode de piégeage d’atomes froids dans des potentiels sublongueur d’onde en champ proche d’une surface nanostructurée." Thesis, Bordeaux, 2018. http://www.theses.fr/2018BORD0265/document.

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Depuis plusieurs décennies un intérêt est né pour combiner deux systèmes quantiques pour former unsystème hybride quantique (SHQ) aux qualités qu’il serait impossible d’atteindre avec un seul des deuxsous-constituants. Parmi les systèmes quantiques, les atomes froids se distinguent par leur fort découplagede l’environnement, permettant un contrôle précis de leurs propriétés intrinsèques. En outre, les simulateursquantiques réalisés en piégeant des atomes froids dans des réseaux optiques présentent des propriétéscontrôlables (échelle d’énergie, géométrie,...) qui permettent d’étudier de nouveau

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Obadia, Nathaniel. "Le modèle de Davies-Fulling et ses généralisations : un modèle pour la radiation de Hawking." Tours, 2003. http://www.theses.fr/2003TOUR4002.

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Dans cette thèse nous reprenons, puis développons, le modèle de Davies-Fulling qui présente de nombreuses analogies avec la radiation engendrée par un Trou Noir. Ce modèle consiste en l'étude de la radiation émise par un miroir se déplaçant dans l'espace-temps de Minkowski. Lorsque la trajectoire est non-inertielle, le miroir engendre un flux d'énergie dont les propriétés sont des fonctionnelles de sa trajectoire. Dans le but de retrouver les problèmes présents dans l'étude de la radiation de Hawking, nous nous sommes interessés principalement au cas des miroirs uniformément accélérés, qui pos

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De, Aquino Carvalho Joao Carlos. "Interaction Casimir-Polder entre atome de césium et surface de saphir thermiquement émissive." Thesis, Sorbonne Paris Cité, 2018. http://www.theses.fr/2018USPCD054.

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Nous décrivons dans cette thèse des mesures spectroscopiques de réflexion sélective qui mettent en évidence les effets thermiques de l'interaction Casimir-Polder entre atome et surface. En régime de champ proche, cette interaction est gouvernée par un potentiel qui décroit avec le cube de la distance entre l'atome et la surface (régime van der Waals -vdW-de type dipôle-dipôle). Nous nous intéressons notamment aux niveaux excités du césium Cs (7P₁/₂) et Cs (7P₃/₂), qui possèdent un couplage dipolaire avec Cs (6D) à, respectivement, 12,15 µm et ~15 µm, interagissant avec une surface de saphir th

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Bugler-Lamb, Samuel Lloyd. "The quantum vacuum near time-dependent dielectrics." Thesis, University of Exeter, 2017. http://hdl.handle.net/10871/29879.

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The vacuum, as described by Quantum Field Theory, is not as empty as classical physics once led us to believe. In fact, it is characterised by an infinite energy stored in the ground state of its constituent fields. This infinite energy has real, tangible effects on the macroscopic clusters of matter that make up our universe. Moreover, the configuration of these clusters of matter within the vacuum in turn influences the form of the vacuum itself and so forth. In this work, we shall consider the changes to the quantum vacuum brought about by the presence of time-dependent dielectrics. Such ch

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Devailly, Clémence. "Fluctuations thermiques - un outil pour étudier les fluides simples et binaires à l'échelle du micron." Thesis, Lyon, École normale supérieure, 2014. http://www.theses.fr/2014ENSL0976.

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Les transitions de phase près d'un point critique - dites du second ordre - sont un sujet toujours d'actualité en raison des nombreux phénomènes critiques intéressants tels que la force de Casimir critique, les problèmes de confinements ou les phénomènes hors d'équilibre suivant une trempe au point critique. Cette thèse vise à étudier expérimentalement certains phénomènes engendrés près d'un point critique. La thèse est divisée en deux axes : le premier consiste à développer plusieurs systèmes expérimentaux qui permettront de mesurer essentiellement la viscosité, par l'intermédiaire des fluctu

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Hertlein, Johann Christopher. "Messung kritischer Casimir-Kräfte mit TIRM." [S.l. : s.n.], 2008. http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-37124.

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Maury, Axel. "Effet Casimir-Polder sur des atomes piégés." Thesis, Paris 6, 2016. http://www.theses.fr/2016PA066327/document.

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Ce travail de thèse présente la modélisation théorique de l'expérience FORCA-G. L'objectif de cette expérience est la mesure des interactions à courte portée entre des atomes piégés dans un réseau optique et une surface massive à une grande précision. Nous nous sommes intéressés plus particulièrement à l'effet Casimir-Polder induit par la surface sur les atomes. Le but était de fournir la prédiction la plus précise possible des états atomiques. Ceci a consisté à considérer les effets de la température sur l'interaction Casimir-Polder et modéliser la surface de la manière la plus réaliste possi

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Busch, Xavier. "Effets dispersifs et dissipatifs en théorie quantique des champs en espace-temps courbe pour modéliser des systèmes de matière condensée." Thesis, Paris 11, 2014. http://www.theses.fr/2014PA112205/document.

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Les deux principales prédictions de la théorie quantique des champs en espace-temps courbe, à savoir la radiation de Hawking et la production de paires de particules ayant lieu dans un espace-temps non stationnaire, n'ont jamais été testé expérimentalement et impliquent toutes deux des processus à ultra haute énergie. En conséquence, de telles prédictions doivent être considérées prudemment. En utilisant l'analogie avec des systèmes de matière condensée mise en avant par Unruh, leur analogue pourrait être testé en laboratoire. Par ailleurs, dispersion et dissipation sont toujours présentes dan

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Intravaia, Francesco. "Effet Casimir et interaction entre plasmons de surface." Phd thesis, Université Pierre et Marie Curie - Paris VI, 2005. http://tel.archives-ouvertes.fr/tel-00009755.

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Dans cette thèse on discute l'influence des plasmons de surfaces sur l'effet Casimir entre deux miroirs métalliques plans et parallèles placés à une distance arbitraire. En utilisant le model plasma pour décrire la réponse optique du métal, on exprime l'énergie de Casimir comme une somme des contributions associées aux modes évanescents relatifs aux plasmons de surface et aux modes propagatifs de la cavité. Contrairement à une ce qu'on pouvait attendre, la contribution des modes plasmoniques est essentielle à toute distance afin d'assurer le correct résultat pour l'énergie de Casimir. Un des d

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