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Dissertations / Theses on the topic 'Quantum theory. Quantum optics'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Pope, Damian. "Contrasting quantum mechanics to local hidden variables theories in quantum optics and quantum information science /." [St. Luica, Qld.], 2002. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe16765.pdf.

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2

HOLM, DAVID ALLEN. "QUANTUM THEORY OF MULTIWAVE MIXING (RESONANCE FLUORESCENCE, SATURATION SPECTROSCOPY, MODULATION, PHASE CONJUGATION, QUANTUM NOISE)." Diss., The University of Arizona, 1985. http://hdl.handle.net/10150/187980.

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This dissertation formulates and applies a theory describing how one or two strong classical waves and one or two weak quantum mechanical waves interact in a two-level medium. The theory unifies many topics in quantum optics, such as resonance fluorescence, saturation spectroscopy, modulation spectroscopy, the build up of laser and optical bistability instabilities, and phase conjugation. The theory is based on a quantum population pulsation approach that resembles the semiclassical theories, but is substantially more detailed. Calculations are performed to include the effects of inhomogeneous

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3

Jenkins, Stewart David. "Theory of light -atomic ensemble interactions entanglement, storage, and retrieval /." Diss., Available online, Georgia Institute of Technology, 2006, 2006. http://etd.gatech.edu/theses/available/etd-09252006-175848/.

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Thesis (Ph. D.)--Physics, Georgia Institute of Technology, 2007.<br>Kennedy, T. A. Brian, Committee Chair ; Kuzmich, Alex, Committee Member ; Chapman, Michael S., Committee Member ; Raman, Chandra, Committee Member ; Morley, Thomas D., Committee Member.

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4

Dorier, Vincent. "Quantum theory of light in linear media : applications to quantum optics and quantum plasmonics." Thesis, Bourgogne Franche-Comté, 2020. http://www.theses.fr/2020UBFCK006.

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Nous développons une méthode de quantification du champ électromagnétique en interaction linéaire avec les milieux passifs d'une part, et les milieux actifs (plasmoniques) d'autre part. Cette méthode repose sur la construction d'une structure Hamiltonienne compatible avec les équations de Maxwell, puis sur un principe de correspondence et la définition d'un espace de Fock des états quantiques. Nous utilisons les résultats de la théorie quantique pour étudier la propagation de photons dans des environnements diéléctriques et l'émission de plasmons uniques<br>We develop a method of quantization

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5

Liu, Xunmimg. "Nonlinear dynamics in quantum optics /." St. Lucia, Qld, 2004. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe17835.pdf.

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6

Mertens, Christopher J. "Many-body theory of dissipative quantum optical systems." Diss., Georgia Institute of Technology, 1995. http://hdl.handle.net/1853/30316.

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7

Menzies, David. "Procrustean entanglement concentration, weak measurements and optimized state preparation for continuous-variable quantum optics." Thesis, St Andrews, 2009. http://hdl.handle.net/10023/739.

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8

Kennedy, Thomas Albert Brian. "Theory of fluctuations and collisions in quantum optics." Thesis, Queen's University Belfast, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.254184.

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9

Clemens, James Peter. "Collective spontaneous emission in the framework of quantum trajectory theory /." view abstract or download file of text, 2003. http://wwwlib.umi.com/cr/uoregon/fullcit?p3102158.

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Thesis (Ph. D.)--University of Oregon, 2003.<br>Typescript. Includes vita and abstract. Includes bibliographical references (leaves 129-135). Also available for download via the World Wide Web; free to University of Oregon users.

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10

Devitt, Simon John. "Quantum information engineering : concepts to quantum technologies /." Connect to thesis, 2007. http://eprints.unimelb.edu.au/archive/00003925.

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11

Funk, Andrew Christopher. "Cryptography using two-mode quantum mechanically squeezed optical pulses /." view abstract or download file of text, 2004. http://wwwlib.umi.com/cr/uoregon/fullcit?p3120623.

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Thesis (Ph. D.)--University of Oregon, 2004.<br>Typescript. Includes vita and abstract. Includes bibliographical references (leaves 204-209). Also available for download via the World Wide Web; free to University of Oregon users.

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12

Matloob, Mohammad Reza. "Theory of electromagnetic field quantization in material media." Thesis, University of Essex, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.282572.

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13

Kok, Pieter. "State preparation and some applications in quantum optics within the context of quantum information theory." Thesis, Bangor University, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.327425.

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14

Jen, Hsiang-Hua. "Theory of light-matter interactions in cascade and diamond type atomic ensembles." Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/37288.

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In this thesis, we investigate the quantum mechanical interaction of light with matter in the form of a gas of ultracold atoms: the atomic ensemble. We present a theoretical analysis of two problems, which involve the interaction of quantized electromagnetic fields (called signal and idler) with the atomic ensemble (i) cascade two-photon emission in an atomic ladder configuration, and (ii) photon frequency conversion in an atomic diamond configuration. The motivation of these studies comes from potential applications in long-distance quantum communication where it is desirable to generate qu

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15

Hu, Yuan Zheng. "Theory of electron-hole pair excitations in semiconductor quantum dots." Diss., The University of Arizona, 1991. http://hdl.handle.net/10150/185516.

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This dissertation considers one- and two-electron-hole-pair excitations in ideally spherical semiconductor quantum dots with infinite or finite confinement potentials. The optical absorption edge of the semiconductor micsrocrystallites is found to be higher than that in the corresponding bulk semiconductor. This blue shift is approximately proportional to 1/R², where R is the radius of the semiconductor microspheres. For small quantum dots with infinite confinement potential, the energies and wave-functions of quantum confined excitons and biexcitons are computed using a numerical matrix diago

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16

An, Sunghyuck. "Theory of multiwave mixing in two- and three-level media." Diss., The University of Arizona, 1988. http://hdl.handle.net/10150/184560.

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This dissertation presents theories of multiwave mixing in two- and three-level media. The first part of the dissertation treats the semiclassical theories in two-level media. Chapter 2 gives the simple semiclassical theory of four-wave mixing when the two pump frequences differ by more than the reciprocal of the population-difference lifetime. This difference washes out the pump spatial holes as well as one of the two reflection gratings. We compare the results to the degenerate treatment of Abrams and Lind and find significant differences in the reflection coefficient spectra. Chapter 3 pres

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17

Fearn, H. "Non-classical effects in optics." Thesis, University of Essex, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.235151.

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18

Crimin, Frances. "Quantum theory of the Penning trap : an exploration of the low temperature regime." Thesis, University of Sussex, 2018. http://sro.sussex.ac.uk/id/eprint/74654/.

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The objective of this thesis is to develop the quantum theory of the motional degrees of freedom of a charged particle in a Penning trap. The theory is treated within the formalism of quantum optics, and explores the use of dressed-atom methods by exploiting the threefold SU(N) algebraic structure of the problem. The quantum form of the experimental techniques of sideband coupling and driving to the ultra-elliptical regime are examined in this context, and resulting future applications considered. Interpretation of the quantum dynamics of the separate x and y motions of an electron is discusse

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19

Yang, Zhenshan. "Theory of excitonic optical properties of semiconductor quantum wells and Bragg structures." Diss., The University of Arizona, 2005. http://hdl.handle.net/10150/282892.

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This dissertation addresses both fundamental aspects of the coherent exciton kinetics in single semiconductor quantum wells and more application-oriented aspects of the collective excitonic optical properties in quantum well Bragg structures. We use a bosonic theory to investigate the ultrafast coherent exciton dynamics after an optical excitation in a single semiconductor quantum well. It is shown that, on intermediate time scales, nonlinear mean-field interactions between excitons lead to a coherent, wave-like evolution in the momentum distribution of optically inactive excitons, which can s

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20

Lai, Yinchieh. "Quantum theory of optical solitons." Thesis, Massachusetts Institute of Technology, 1991. http://hdl.handle.net/1721.1/42512.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1991.<br>Includes bibliographical references (leaves 93-98).<br>v by Yinchieh Lai.<br>Ph.D.

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21

Ambrose, Bradley Scott. "Investigation of student understanding of the wave-like properties of light and matter /." Thesis, Connect to this title online; UW restricted, 1999. http://hdl.handle.net/1773/9696.

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22

Folland, Thomas. "Frequency control of terahertz quantum cascade lasers : theory and measurement." Thesis, University of Manchester, 2017. https://www.research.manchester.ac.uk/portal/en/theses/frequency-control-of-terahertz-quantum-cascade-lasers-theory-and-measurement(d4c55769-f053-4b79-aed3-e2fec575adde).html.

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Terahertz (THz) technology stands to solve a number of problems in everyday life, from next generation wireless communication to spectroscopic identification and imaging. However it is technically challenging to make a high power, compact source for terahertz radiation. The Quantum Cascade Laser (QCL), which produces gain at THz frequencies by exploiting inter-sub-band transitions in quantum wells, offers one solution to this problem. However controlling and detecting the emission from such sources remains a major challenge. This thesis investigates the theory and measurement of emission frequ

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23

Valley, John Francis. "Nonlinear optical experiments in sodium vapor and comparison with Doppler-broadened two-level-atom theory." Diss., The University of Arizona, 1989. http://hdl.handle.net/10150/184930.

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Two spectral regions of gain exist for a weak probe beam propagating through a medium of two-level-atoms pumped by a strong near-resonance field. Experimentally a cw ring-dye laser is used to explore this gain at the Na D₂ resonance in a vapor. Plane-wave calculations of probe-gain spectra which include the Doppler broadening inherent in a vapor agree well with experimental spectra obtained with a Fabry-Perot interferometer. Such two-beam-coupling gain might have applications as optical pre- or power amplifiers. The gain is also the primary step in four-wave-mixing. Mixing of the pump and side

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24

Madison, Kirk William. "Quantum transport in optical lattices /." Digital version accessible at:, 1998. http://wwwlib.umi.com/cr/utexas/main.

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25

Henkel, Carsten. "Coherence theory of atomic de Broglie waves and electromagnetic near fields." Thesis, [S.l. : s.n.], 2004. http://pub.ub.uni-potsdam.de/2004/0027/henkel.pdf.

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26

Ohliger, Matthias. "Characterizing and measuring properties of continuous-variable quantum states." Phd thesis, Universität Potsdam, 2012. http://opus.kobv.de/ubp/volltexte/2012/6292/.

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We investigate properties of quantum mechanical systems in the light of quantum information theory. We put an emphasize on systems with infinite-dimensional Hilbert spaces, so-called continuous-variable systems'', which are needed to describe quantum optics beyond the single photon regime and other Bosonic quantum systems. We present methods to obtain a description of such systems from a series of measurements in an efficient manner and demonstrate the performance in realistic situations by means of numerical simulations. We consider both unconditional quantum state tomography, which is applic

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27

Webb, James Engineering &amp Information Technology Australian Defence Force Academy UNSW. "The measurement, creation and manipulation of quantum optical states via photodetection." Awarded by:University of New South Wales - Australian Defence Force Academy. Engineering & Information Technology, 2009. http://handle.unsw.edu.au/1959.4/43686.

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In this thesis, we demonstrate an array of photodetection theory and techniques bridging the traditional discrete and continuous variable experimental domains. In quantum optics, the creation and measurement of states of light are intertwined and we present experimental architectures considering both aspects. We describe the measurement of mean photon numbers at optical sideband frequencies using homodyne detection. We use our technique to provide a direct comparison to photon-counting measurements and observe that our technique exhibits superior speed, dynamic range and mode selectivit

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28

Ley, M. D. "The quantum theory of linear optical amplifiers, saturable absorption and optical interference experiments." Thesis, University of Essex, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.375649.

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29

Hussain, N. A. "The quantum theory of optical parametric amplification." Thesis, University of Essex, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.302847.

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30

Starvrou, Vasilios N. "Theory of electron-optical phonon interactions in quantum wells and quantum well laser structures." Thesis, University of Essex, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.285854.

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31

Rådmark, Magnus. "Photonic quantum information and experimental tests of foundations of quantum mechanics." Doctoral thesis, Stockholms universitet, Fysikum, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-37464.

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Entanglement is a key resource in many quantum information schemes and in the last years the research on multi-qubit entanglement has drawn lots of attention. In this thesis the experimental generation and characterisation of multi-qubit entanglement is presented. Specifically we have prepared entangled states of up to six qubits. The qubits were implemented in the polarisation degree of freedom of single photons. We emphasise that one type of states that we produce are rotationally invariant states, remaining unchanged under simultaneous identical unitary transformations of all their individu

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32

Zheng, Yindong. "Chaos and Momentum Diffusion of the Classical and Quantum Kicked Rotor." Thesis, University of North Texas, 2005. https://digital.library.unt.edu/ark:/67531/metadc4824/.

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The de Broglie-Bohm (BB) approach to quantum mechanics gives trajectories similar to classical trajectories except that they are also determined by a quantum potential. The quantum potential is a "fictitious potential" in the sense that it is part of the quantum kinetic energy. We use quantum trajectories to treat quantum chaos in a manner similar to classical chaos. For the kicked rotor, which is a bounded system, we use the Benettin et al. method to calculate both classical and quantum Lyapunov exponents as a function of control parameter K and find chaos in both cases. Within the chaotic se

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33

Wang, Ligang. "Wave propagation in dispersive media and one-dimensional photonic crystals." HKBU Institutional Repository, 2005. http://repository.hkbu.edu.hk/etd_ra/614.

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34

Schafer, Joachim. "Information transmission through bosonic gaussian channels." Doctoral thesis, Universite Libre de Bruxelles, 2013. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209420.

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In this thesis we study the information transmission through Gaussian quantum channels. Gaussian quantum channels model physical communication links, such as free space communication or optical fibers and therefore, may be considered as the most relevant quantum channels. One of the central characteristics of any communication channel is its capacity. In this work we are interested in the classical capacity, which is the maximal number of bits that can be reliably transmitted per channel use. An important lower bound on the classical capacity is given by the Gaussian capacity, which is the max

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35

Guha, Saikat 1980. "Multiple-user quantum information theory for optical communication channels." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/44413.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2008.<br>Includes bibliographical references (p. 231-239).<br>Research in the past decade has established capacity theorems for point-to-point bosonic channels with additive thermal noise, under the presumption of a conjecture on the minimum output von Neumann entropy. In the first part of this thesis, we evaluate the optimum capacity for free-space line-of-sight optical communication using Gaussian-attenuation apertures. Optimal power allocation across all the spatiotemporal modes is

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36

Thwaite, Simon James. "Simulations of systems of cold Rydberg atoms." Thesis, University of Oxford, 2012. https://ora.ox.ac.uk/objects/uuid:454e438d-2a3c-4c91-b1d4-2c594cbab2ce.

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The past three decades have seen extraordinary progress in the manipulation of neutral atoms with laser light, to the point where it is now routine to trap and cool both individual atoms and entire atomic clouds to temperatures of only a few tens of nanoKelvin in a controlled and repeatable fashion. In this thesis we study several applications of Rydberg atoms - atoms with an electron in a highly excited state - within such ultracold atomic systems. Due to their highly-excited electron, Rydberg atoms have a number of exaggerated properties: in addition to being physically large, they have long

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37

Ong, Beng Seong. "Spectral problems of optical waveguides and quantum graphs." Texas A&M University, 2006. http://hdl.handle.net/1969.1/4352.

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In this dissertation, we consider some spectral problems of optical waveguide and quantum graph theories. We study spectral problems that arise when considerating optical waveguides in photonic band-gap (PBG) materials. Specifically, we address the issue of the existence of modes guided by linear defects in photonic crystals. Such modes can be created for frequencies in the spectral gaps of the bulk material and thus are evanescent in the bulk (i.e., confined to the guide). In the quantum graph part we prove the validity of the limiting absorption principle for finite graphs with infinite lead

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38

Kim, Soo Y. "Cold single atoms for cavity QED experiments." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/26581.

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Thesis (Ph.D)--Physics, Georgia Institute of Technology, 2009.<br>Committee Chair: Chapman, Michael; Committee Member: Citrin, David; Committee Member: Kennedy, T. A. Brian; Committee Member: Kuzmich, Alexander; Committee Member: Raman, Chandra. Part of the SMARTech Electronic Thesis and Dissertation Collection.

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39

Jacobson, David. "Spectral modulation, gravity and time-dependent correlations in neutron interferometry /." free to MU campus, to others for purchase, 1996. http://wwwlib.umi.com/cr/mo/fullcit?p9720550.

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40

Allcock, Philip. "A microscopic quantum electrodynamical theory of novel nonlinear optical processes." Thesis, University of East Anglia, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.338097.

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41

Jogenfors, Jonathan. "Breaking the Unbreakable : Exploiting Loopholes in Bell’s Theorem to Hack Quantum Cryptography." Doctoral thesis, Linköpings universitet, Informationskodning, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-140912.

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In this thesis we study device-independent quantum key distribution based on energy-time entanglement. This is a method for cryptography that promises not only perfect secrecy, but also to be a practical method for quantum key distribution thanks to the reduced complexity when compared to other quantum key distribution protocols. However, there still exist a number of loopholes that must be understood and eliminated in order to rule out eavesdroppers. We study several relevant loopholes and show how they can be used to break the security of energy-time entangled systems. Attack strategies are

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42

Amselem, Elias. "Dynamics of Quantum Correlations with Photons : Experiments on bound entanglement and contextuality for application in quantum information." Doctoral thesis, Stockholms universitet, Fysikum, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-66469.

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The rapidly developing interdisciplinary field of quantum information, which merges quantum and information science, studies non-classical aspects of quantum systems. These studies are motivated by the promise that the non-classicality can be used to solve tasks more efficiently than classical methods would allow. In many quantum informational studies, non-classical behaviour is attributed to the notion of entanglement. In this thesis we use photons to experimentally investigate fundamental questions such as: What happens to the entanglement in a system when it is affected by noise? In our stu

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43

Niset, Julien. "Quantum information with optical continuous variables: nonlocality, entanglement, and error correction." Doctoral thesis, Universite Libre de Bruxelles, 2008. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210459.

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L'objectif de ce travail de recherche est l'étude des posibilités offertes par une nouvelle approche de l'information quantique basée sur des variables quantiques continues. Lorsque ces variables continues sont portées par le champs éléctromagnétique, un grand nombre de protocoles d'information quantique peuvent être implémentés à l'aide de lasers et d'éléments d'optique linéaire standards. Cette simplicité expérimentale rend cette approche très intéressantes d'un point de vue pratique, en particulier pour le développement des futurs réseaux de communications quantiques.<p><p>Le travail peut s

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44

Jeffers, John Richard. "Quantum theory of amplification and detection of travelling-wave optical fields." Thesis, University of Essex, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.316286.

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45

Meney, Alistair Thomas. "Theory of the optical properties of III-V semiconductor quantum wells." Thesis, Connect to e-thesis, 1992. http://theses.gla.ac.uk/881/.

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46

Arciniegas, Carlos Andres Gonzalez. "Geração de estados não clássicos do campo eletromagnético através do processo de mistura de quatro ondas em meios atômicos." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/43/43134/tde-07102014-171411/.

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Estudamos teoricamente a geração de estados emaranhados do campo eletromagnético através do processo de mistura de quatro ondas em uma nuvem de átomos frios em configuração duplo- trabalhando perto da ressonância. Mostra-se que neste caso é possível gerar emaranhamento com uma potência de bombeio muito menor do que na situação em que temos átomos quentes [17]. Baseando-se nos parâmetros da armadilha de átomos de rubídio de nosso laboratório, calcula-se uma violação de 46.5 % do limite imposto pela desigualdade DGCZ [59] para uma frequência de Rabi dos bombeios de =0.8 MHz (neste caso, equiva

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47

Lamoureux, Louis-Philippe. "Theoretical and experimental aspects of quantum cryptographic protocols." Doctoral thesis, Universite Libre de Bruxelles, 2006. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210776.

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La mécanique quantique est sans aucun doute la théorie la mieux vérifiée qui n’a jamais existée. En se retournant vers le passé, nous constatons qu’un siècle de théorie quantique a non seulement changé la perception que nous avons de l’univers dans lequel nous vivons mais aussi est responsable de plusieurs concepts technologiques qui ont le potentiel de révolutionner notre monde.<p> <p>La présente dissertation a pour but de mettre en avance ces potentiels, tant dans le domaine théorique qu’expérimental. Plus précisément, dans un premier temps, nous étudierons des protocoles de communication qu

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48

Carberry, David Michael. "Optical tweezers : experimental demonstrations of the fluctuation theorem /." View thesis entry in Australian Digital Theses Program, 2005. http://thesis.anu.edu.au/public/adt-ANU20060410.122727/index.html.

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49

Jacquet, Maxime J. "Negative frequency at the horizon : scattering of light at a refractive index front." Thesis, University of St Andrews, 2017. http://hdl.handle.net/10023/11780.

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This thesis considers the problem of calculating and observing the mixing of modes of positive and negative frequency in inhomogeneous, dispersive media. Scattering of vacuum modes of the electromagnetic field at a moving interface in the refractive index of a dielectric medium is discussed. Kinematics arguments are used to demonstrate that this interface may, in a regime of linear dispersion, act as the analogue of the event horizon of a black hole to modes of the field. Furthermore, a study of the dispersion of the dielectric shows that five distinct configurations of modes of the inhomogene

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50

Garcia-Patron, Sanchez Raul. "Quantum information with optical continuous variables: from Bell tests to key distribution." Doctoral thesis, Universite Libre de Bruxelles, 2007. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210655.

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In this thesis we have studied different aspects of the novel field of quantum information with continuous variables. The higher efficiency and bandwidth of homodyne detection combined with the easiness of generation and manipulation of Gaussian states makes continuous-variable quantum information a promising and flourishing field of research. This dissertation is divided in two parts. The first part explores two applications of the “photon subtraction” operation; Firstly, a technique to generate highly non-Gaussian single-mode states of light; Secondly, an experimental setup capable of realiz

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