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Автор: Grafiati
Опубліковано: 6 вересня 2023

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Статті в журналах з теми "QUANTUM MODE COUPLING THEORY"

1

Rabani, Eran, Kunimasa Miyazaki, and David R. Reichman. "Quantum mode-coupling theory for binary mixtures." Journal of Chemical Physics 122, no. 3 (January 15, 2005): 034502. http://dx.doi.org/10.1063/1.1832593.

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2

Loring, Roger F., and Shaul Mukamel. "Self-consistent mode-coupling theory of quantum percolation." Physical Review B 33, no. 11 (June 1, 1986): 7708–14. http://dx.doi.org/10.1103/physrevb.33.7708.

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3

Schirmacher, W., E. Maurer, and M. Pöhlmann. "Quantum mode-coupling theory for vibrational excitations of glasses." physica status solidi (c) 1, no. 1 (January 2004): 17–20. http://dx.doi.org/10.1002/pssc.200303641.

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4

Rabani, Eran, and David R. Reichman. "QUANTUM MODE-COUPLING THEORY: Formulation and Applications to Normal and Supercooled Quantum Liquids." Annual Review of Physical Chemistry 56, no. 1 (May 5, 2005): 157–85. http://dx.doi.org/10.1146/annurev.physchem.56.092503.141138.

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5

BELYAEV, V. M. "SOFT MODE CONTRIBUTION TO PATH INTEGRALS." International Journal of Modern Physics A 08, no. 23 (September 20, 1993): 4019–30. http://dx.doi.org/10.1142/s0217751x93001648.

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A method for nonperturbative path integral calculation is proposed. Quantum mechanics as the simplest example of a quantum field theory is considered. All modes are decomposed into hard (with frequencies [Formula: see text]) and soft (with frequencies [Formula: see text]) ones, where ω0 is some parameter. Hard mode contribution is considered through weak coupling expansion. A low energy effective Lagrangian for soft modes is used. In the case of soft modes we apply a strong coupling expansion. To realize this expansion a special basis in functional space of trajectories is considered. A good convergency for the pro posed procedure in the case of potential V(x)=λx4 is demonstrated. The ground state energy of the unharmonic oscillator is calculated.
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6

Ciracì, Cristian, Radoslaw Jurga, Muhammad Khalid, and Fabio Della Sala. "Plasmonic quantum effects on single-emitter strong coupling." Nanophotonics 8, no. 10 (August 14, 2019): 1821–33. http://dx.doi.org/10.1515/nanoph-2019-0199.

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AbstractCoupling between electromagnetic cavity fields and fluorescent molecules or quantum emitters can be strongly enhanced by reducing the cavity mode volume. Plasmonic structures allow light confinement down to volumes that are only a few cubic nanometers. At such length scales, nonlocal and quantum tunneling effects are expected to influence the emitter interaction with the surface plasmon modes, which unavoidably requires going beyond classical models to accurately describe the electron response at the metal surface. In this context, the quantum hydrodynamic theory (QHT) has emerged as an efficient tool to probe nonlocal and quantum effects in metallic nanostructures. Here, we apply state-of-the-art QHT to investigate the quantum effects on strong coupling of a dipole emitter placed at nanometer distances from metallic particles. A comparison with conventional local response approximation (LRA) and Thomas-Fermi hydrodynamic theory results shows the importance of quantum effects on the plasmon-emitter coupling. The QHT predicts qualitative deviation from LRA in the weak coupling regime that leads to quantitative differences in the strong coupling regime. In nano-gap systems, the inclusion of quantum broadening leads to the existence of an optimal gap size for Rabi splitting that minimizes the requirements on the emitter oscillator strength.
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7

Yan, Xiao-Hong, Yi-Jie Niu, Hong-Xing Xu, and Hong Wei. "Strong coupling of single plasmonic nanoparticles and nanogaps with quantum emitters." Acta Physica Sinica 71, no. 6 (2022): 067301. http://dx.doi.org/10.7498/aps.71.20211900.

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In cavity quantum electrodynamics, when the interaction between quantum emitter and cavity mode is strong enough to overcome the mean decay rate of the system, it will enter into a strong coupling regime, thereby forming part-light part-matter polariton states. Strong coupling can serve as a promising platform for room temperature Bose-Einstein condensation, polariton lasing, single photon nonlinearity, quantum information, etc. Localized surface plasmons supported by single metal nanostructures possess extremely small mode volume, which is favorable for realizing strong coupling. Moreover, the nanoscale dimensions of plasmonic structures can facilitate the miniaturization of strong coupling systems. Here, the research progress of strong plasmon-exciton coupling between single metal nanoparticles/nanogaps and quantum emitters is reviewed. The theory background of strong coupling is first introduced, including quantum treatment, classical coupled oscillator model, as well as the analytical expressions for scattering and photoluminescence spectra. Then, strong coupling between different kinds of plasmonic nanostructures and quantum emitters is reviewed. Single metal nanoparticles, nanoparticle dimers, and nanoparticle-on-mirror structures constitute the most typical plasmonic nanostructures. The nanogaps in the latter two systems can highly concentrate electromagnetic field, providing optical nanocavities with smaller mode volume than single nanoparticles. Therefore, the larger coupling strength can be achieved in the nanogap systems, which is conducive to strong coupling at the single-exciton level. In addition, the active tuning of strong coupling based separately on thermal, electrical and optical means are reviewed. The energy and oscillator strength of the excitons in transition metal dichalcogenide (TMDC) monolayers are dependent on temperature. Therefore, the strong coupling can be tuned by heating or cooling the system. The excitons in TMDC monolayers can also be tuned by electrical gating, enabling electrical control of strong coupling. Optically tuning the quantum emitters provides another way to actively control the strong coupling. Overall, the research on active tuning of strong plasmon-exciton coupling is still very limited, and more investigations are needed. Finally, this review is concluded with a short summary and the prospect of this field.
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8

Wang, Zhihang, Lingyao Li, Xiaoqi Shi, Jiamin Xiao, Zhicheng Guo, and Wenxin Wang. "Bound states in the continuum induced by the strong coupling within the plasmonic lattices." Journal of Applied Physics 133, no. 15 (April 21, 2023): 153101. http://dx.doi.org/10.1063/5.0148144.

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Bound states in the continuum (BICs), manifesting themselves as the collapse of Fano resonance, are observed in many photonic and plasmonic systems. The BICs have been studied systematically through various methods such as the topological photonics analysis, temporal coupled mode theory, multipole decomposition method, and the cavity quantum electrodynamics (CQED) method. Since CQED can give a macroscopic and intrinsic description of light–matter interaction, it is expected to study BIC that participates in strong coupling. What is more, the relation between coupling strength, the Fano parameter, and the asymmetry property of BICs needs to be clarified. In this paper, we investigated the strong coupling between the cavity mode and Bloch-surface plasmon polariton (Bloch-SPP) mode induced by BICs within the plasmonic lattices of the metal-dielectric-metal (MDM) layer. The properties of strong coupling and BIC were revealed theoretically by the quantum model based on the CQED. The increase in the Fano parameters of BICs was proved to facilitate the coupling strength, which was indicated by the monotonically increasing relation between the Fano parameter and the coupling strength. This work may pave the way for flexible modulation and application of BIC in the fields of high-quality plasmonic nanocavity, low-threshold nano-lasers, and quantum information.
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9

Lytaev, A. A., and I. Yu Popov. "Computation of optical waveguide interaction for quantum gates implementation." Journal of Physics: Conference Series 2086, no. 1 (December 1, 2021): 012153. http://dx.doi.org/10.1088/1742-6596/2086/1/012153.

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Abstract The system of two coupled optical dual-mode waveguides is considered. The coupling of the system is studied to find a circuit for building a control switch for two qubit gates. The classical coupled mode theory is applied and the exact expressions for coupling coefficients are derived. The parameters of the system for performing the desired operations are numerically computed and analysed. The system describing the influence of intermodal interactions is solved numerically. The distortions are analysed.
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10

XU, GU, DINGZHOU LI, BINGSHEN WANG, and ZHAO-BIN SU. "SEMICLASSICAL THEORY OF EXCITONIC POLARITONS IN A PLANAR SEMICONDUCTOR MICROCAVITY." International Journal of Modern Physics B 14, no. 08 (March 30, 2000): 783–807. http://dx.doi.org/10.1142/s0217979200000662.

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We present a comprehensive theoretical description of quantum well exciton–polaritons imbedded in a planar semiconductor microcavity. The exact nonlacal dielectric response of the quantum well exciton is treated in detail. The 4-spinor structure of the hole subband in the quantum well is considered, including the pronounced band mixing effect. The scheme is self-contained and can be used to treat different semiclassical aspects of the microcavity properties. As an example, we analyze the "selection" rules for the exciton–cavity mode coupling for different excitons.
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Дисертації з теми "QUANTUM MODE COUPLING THEORY"

1

Weichselbaum, Andreas. "Nanoscale Quantum Dynamics and Electrostatic Coupling." Ohio University / OhioLINK, 2004. http://www.ohiolink.edu/etd/view.cgi?ohiou1091115085.

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2

Chenaghlou, Alireza. "Quantum corrections to the classical reflection factor of the sinh-Gordon model." Thesis, Durham University, 2000. http://etheses.dur.ac.uk/4347/.

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This thesis studies the quantum reflection factor of the sinh-Gordon model under boundary conditions consistent with integrability. First, we review the affine Toda field theory in Chapter One. In particular, the classical and quantum integrability of the theory are reviewed on the whole line and on the half-line as well, that is, in the presence of a boundary. We next consider the sinh-Gordon model which is restricted to a half-line by boundary conditions maintaining integrability in Chapter Two. A perturbative calculation of the reflection factor is given to one loop order in the bulk coupling and to first order in the difference of the two parameters introduced at the boundary. The result provides a further verification of Ghoshal's formula. The calculation is consistent with a conjecture for the general dependence of the reflection factor on the boundary parameters and the bulk coupling. In Chapter Three, quantum corrections to the classical reflection factor of the sinh-Gordon model are studied up to second order in the difference of boundary data and to one loop order in the bulk coupling. Chapter Four deals with the quantum reflection factor for the sinh-Gordon model with general boundary conditions. The model is studied under boundary conditions which are compatible with integrability and in the framework of the conventional perturbation theory generalised to the affine Toda field theory. It is found that the general form of a subset of the related quantum corrections are hypergeometric functions. Finally, we sum up this thesis in Chapter Five along with some conclusions and suggestions for further future studies.
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3

Ablikim, Medina. "Boundary sinh-Gordon model and its supersymmetric extension." Thesis, Durham University, 1999. http://etheses.dur.ac.uk/4853/.

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Three different aspects of the sinh-Gordon model are explored in this thesis. We begin, in chapter one, with a summary of the model and the necessary background. Chapter two studies the model with two boundary conditions. Two approaches are presented to investigate the reflection factors off the boundaries and the energy of the theory. In chapter three, perturbation theory is developed to study the theory with one general boundary condition. A contribution to the quantum reflection factor is obtained and compared with the result obtained for the special boundary condition. Chapters four and five investigate the supersymmetric extension of the model in the presence of a single boundary. Firstly, the classical limits of the supersymmetric reflection matrices are checked. The exact reflection factors are studied perturbatively up to the second order of the coupling constant. Secondly, the perturbation theory and the path integral formalism are employed in the supersymmetric model to study the quantum reflection factors. We conclude with a brief sixth chapter describing the outlook for further investigations.
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4

Niemi, David. "Coupling down converted light into single mode fibers /." Diss., CLICK HERE for online access, 2007. http://contentdm.lib.byu.edu/ETD/image/etd1827.pdf.

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5

Restrepo, Juan Sebastián. "Theory of quantum optomechanics with unconventional nonlinear coupling schemes." Paris 7, 2014. http://www.theses.fr/2014PA077228.

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Ces dernières années la zoologie de systèmes quantiques apprivoisés a vu l'entrée d'un nouveau membre. Dans le domaine des cavités optomécaniques on a démontré qu'il est possible d'amener des résonateurs micro et nanométriques vers leur état quantique fondamental. Ce fait est rendu possible par la capacité de ces cavités à refroidir optiquement les fluctuations browniennes des degrés de liberté mécaniques. Nous étudions des mécanismes non conventionnels de refroidissement optique dans des cavités optomécaniques. En particulier nous discutons comment les forces photothermiques (ou bolométriques) pourraient permettre d'atteindre l'état quantique fondamental d'un résonateur mécanique, et ce dans des régimes de paramètres où le refroidissement usuel par pression de radiation est limité. D'autre part la maturité expérimentale des cavités optomécaniques •Permet aujourd'hui d'explorer des régimes de couplage fort où un seul photon est suffisant pour perturber le résonateur mécanique au delà de ses fluctuations de point zéro. Suivant cette tendance nous présentons nos prédictions théoriques concernant un système qui combine l'électrodynamique quantique de cavité et l'optomécanique quantique. Nous démontrons que l'introduction d'un atome artificiel à deux niveaux dans la cavité optomécanique mène à des régimes de refroidissement et d'amplification inédits. Par ailleurs nous montrons comment la non-linéarité intrinsèque du système à deux niveaux permet d'atteindre des états non-classiques du résonateur mécanique
In recent years the zoology of tamed quantum systems has witnessed the arrival of a new member. In the field of optomechanical cavities it has been proven that it is possible to lead micro and nano mechanical resonators to their vibrational quantum ground state. This feat is made possible by the ability of optomechanical resonators to optically cool down the brownian motion of the mechanical degrees of freedom. We study the cooling mechanisms in optomechanical cavities subject to unconventional coupling schemes. In particular we discuss how pfiotothermal cooling leads the mechanical resonator to its ground state in regimes of parameters for which the more usual radiation pressure based cooling is unable to quench effectively enough the thermal brownian motion. On the other hand the maturity of experimental optomechanics has opened the path for the exploration of strong coupling regimes where a single photon is enough to modify the mechanical properties beyond the zero point fluctuations. Following this trend we present as well our predictions for a system combining quantum electrodynamics and quantum optomechanics. We show that by introducing an artificial two level atom inside the optomechanical cavity the cooling and amplification of mechanical motion are greatly modified. We also show how the intrinsic non-linearity of the artificial atom leads to non-classical states of the mechanical resonator
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6

Niemi, David A. "Coupling Down Converted Light Into Single Mode Fibers." BYU ScholarsArchive, 2007. https://scholarsarchive.byu.edu/etd/893.

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We investigate the influence of the pump and collection mode parameters on the collection efficiency of Type I down converted photons into single mode fibers. For best single and coincidence counting rates, we find that the mode sizes should be close to the same size and that the mode waists should be located near the down-conversion crystal. Larger collection waists give higher collection efficiencies, but lower singles counts.
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7

Voigtmann, Thomas. "Mode coupling theory of the glass transition in binary mixtures." [S.l.] : [s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=967122414.

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8

White, Thomas Patrick. "Theory of resonance and mode coupling in photonic crystal devices." University of Sydney, 2006. http://hdl.handle.net/2123/924.

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Doctor of Philosophy (PhD)
In this thesis we consider several novel photonic crystal structures that derive their properties from optical resonances and mode coupling effects. We present first a theoretical analysis of a new class of photonic crystal device based on the combination of mode coupling and Fabry-Perot resonance effects. These structures exhibit characteristics that make them promising candidates as compact, integrated photonic components. The second aspect we consider is highly-efficient coupling into uniform photonic crystals. The results of this study identify inherent advantages of rod-type photonic crystals over the more common hole-type structures for in-band applications. The third contribution of this thesis is the demonstration of an efficient and powerful theoretical approach to studying photonic crystal devices. Throughout this work, we combine general numerical methods with simple physical models to develop physical insight into the behaviour of photonic crystal structures. We show that this can lead to novel device geometries with highly attractive properties.
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9

White, Thomas P. "Theory of resonance and mode coupling in photonic crystal devices." Connect to full text, 2005. http://hdl.handle.net/2123/924.

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Thesis (Ph. D.)--University of Sydney, 2006.
Title from title screen (viewed 30 May 2008). Submitted in fulfilment of the requirements for the degree of Doctor of Philosophy to the School of Physics, Faculty of Science. "Centre for Ultrahigh-bandwidth Devices for Optical Systems" -- T.p. Degree awarded 2006; thesis submitted 2005. Includes bibliographical references. Also available in print form.
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10

White, Thomas Patrick. "Theory of resonance and mode coupling in photonic crystal devices." Thesis, The University of Sydney, 2005. http://hdl.handle.net/2123/924.

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Анотація:
In this thesis we consider several novel photonic crystal structures that derive their properties from optical resonances and mode coupling effects. We present first a theoretical analysis of a new class of photonic crystal device based on the combination of mode coupling and Fabry-Perot resonance effects. These structures exhibit characteristics that make them promising candidates as compact, integrated photonic components. The second aspect we consider is highly-efficient coupling into uniform photonic crystals. The results of this study identify inherent advantages of rod-type photonic crystals over the more common hole-type structures for in-band applications. The third contribution of this thesis is the demonstration of an efficient and powerful theoretical approach to studying photonic crystal devices. Throughout this work, we combine general numerical methods with simple physical models to develop physical insight into the behaviour of photonic crystal structures. We show that this can lead to novel device geometries with highly attractive properties.
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Книги з теми "QUANTUM MODE COUPLING THEORY"

1

Complex dynamics of glass-forming liquids: A mode-coupling theory. New York: Oxford University Press, 2008.

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2

N, Moskalev A., and Khersonskiĭ V. K, eds. Quantum theory of angular momentum: Irreducible tensors, spherical harmonics, vector coupling coefficients, 3nj symbols. Singapore: World Scientific Pub., 1988.

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3

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

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4

Evans, Myron W. The light magnet, coupling of electronic and nuclear angular momenta in optical NMR and ESR: Quantum theory. Ithaca, N.Y: Cornell Theory Center, Cornell University, 1991.

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5

Theory of semiconductor lasers: From basis of quantum electronics to analyses of the mode competition phenomena and noise. Tokyo: Springer, 2014.

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6

Paolo, Molaro, and SpringerLink (Online service), eds. From Varying Couplings to Fundamental Physics: Proceedings of Symposium 1 of JENAM 2010. Berlin, Heidelberg: Springer-Verlag Berlin Heidelberg, 2011.

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7

Yudaev, Vasiliy. Hydraulics. ru: INFRA-M Academic Publishing LLC., 2021. http://dx.doi.org/10.12737/996354.

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The textbook corresponds to the general education programs of the general courses "Hydraulics" and "Fluid Mechanics". The basic physical properties of liquids, gases, and their mixtures, including the quantum nature of viscosity in a liquid, are described; the laws of hydrostatics, their observation in natural phenomena, and their application in engineering are described. The fundamentals of the kinematics and dynamics of an incompressible fluid are given; original examples of the application of the Bernoulli equation are given. The modes of fluid motion are supplemented by the features of the transient flow mode at high local resistances. The basics of flow similarity are shown. Laminar and turbulent modes of motion in pipes are described, and the classification of flows from a creeping current to four types of hypersonic flow around the body is given. The coefficients of nonuniformity of momentum and kinetic energy for several flows of Newtonian and non-Newtonian fluids are calculated. Examples of solving problems of transient flows by hydraulic methods are given. Local hydraulic resistances, their use in measuring equipment and industry, hydraulic shock, polytropic flow of gas in the pipe and its outflow from the tank are considered. The characteristics of different types of pumps, their advantages and disadvantages, and ways of adjustment are described. A brief biography of the scientists mentioned in the textbook is given, and their contribution to the development of the theory of hydroaeromechanics is shown. The four appendices can be used as a reference to the main text, as well as a subject index. Meets the requirements of the federal state educational standards of higher education of the latest generation. For students of higher educational institutions who study full-time, part-time, evening, distance learning forms of technological and mechanical specialties belonging to the group "Food Technology".
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8

Gotze, Wolfgang. Complex Dynamics of Glass-Forming Liquids: A Mode-Coupling Theory. Oxford University Press, 2012.

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9

Götze, Wolfgang. Complex Dynamics of Glass-Forming Liquids: A Mode-Coupling Theory. Oxford University Press, 2008.

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10

Shore, Bruce W. Our Changing Views of Photons. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780198862857.001.0001.

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This book describes the changing views of the physics community toward photons, and how photons are viewed today in several contexts. The first portion, a ninechapter Memoir with few equations and many definitions, explains the changing view of physicists toward radiation and its wave-particle photons, written for those with interest but possibly without technical background. It gives operational definitions that have been used for photons and their association with quantum-state manipulations that include Quantum Information, astronomical sources and crowds of photons, the boxed fields of cavity Quantum Electrodynamics It defines, qualitatively, the historical photons of Planck, Einstein, Compton, and Bohr, the later photons of Dirac, Feynman, and Glauber, and the photon constituents of the Standard Model of Particle Physics. It points to contemporary photons as causers of change to atoms, as carriers of messages, and as subject to controllable creation and alteration. A second portion, of three tutorial appendices, explains the mathematical background of quantum theory and radiation needed by those whose profession involves photonics and who therefore want more detailed understanding of the Memoir portion: quantum theory and the Schrodinger equation for quantum-state manipulation; Maxwell equations for electromagnetism with wave modes that become photons through a quantization postulate, possibly exhibiting quantum entanglement; and the coupling of atoms and fields to create quasiparticles that are seen as slow and stored light pulses. As with other Memoirs, the present book has idiosyncrasies of the author. Most notably, on the opening page of each chapter, and at the end of the book, is a cartoon drawn by the author, as a grad student, that reflects the changing views of a PhD aspirant toward the grad school experience as he progressed through the graduate school of MIT in the 1950s.
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Частини книг з теми "QUANTUM MODE COUPLING THEORY"

1

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

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

Hecht, K. T. "Angular Momentum Coupling Theory." In Quantum Mechanics, 263–68. New York, NY: Springer New York, 2000. http://dx.doi.org/10.1007/978-1-4612-1272-0_27.

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3

Oehme, Reinhard. "Reduction of Coupling Parameters and Duality." In Quantum Field Theory, 136–56. Berlin, Heidelberg: Springer Berlin Heidelberg, 2000. http://dx.doi.org/10.1007/3-540-44482-3_9.

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4

Zimmermann, W. "Reduction in the Number of Coupling Parameters." In Quantum Field Theory, 211–25. Berlin, Heidelberg: Springer Berlin Heidelberg, 1985. http://dx.doi.org/10.1007/978-3-642-70307-2_13.

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5

Bonitz, Michael. "Strong Coupling Effects. Ladder (T-Matrix) Approximation." In Quantum Kinetic Theory, 183–210. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-24121-0_9.

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6

Brenig, Wilhelm. "Mode Coupling Theory for Impurity Conduction." In Statistical Theory of Heat, 230–36. Berlin, Heidelberg: Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-74685-7_45.

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7

Frenkel, D., and M. van der Hoef. "A Test of Mode-Coupling Theory." In Microscopic Simulations of Complex Flows, 279–89. Boston, MA: Springer US, 1990. http://dx.doi.org/10.1007/978-1-4684-1339-7_20.

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8

Brenig, Wilhelm. "Mode-Coupling Theory for Dynamic Critical Phenomena." In Statistical Theory of Heat, 260–63. Berlin, Heidelberg: Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-74685-7_50.

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9

Roepstorff, Gert. "The Linear-Coupling Theory of Bosons." In Path Integral Approach to Quantum Physics, 170–91. Berlin, Heidelberg: Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-642-57886-1_5.

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10

Loudon, R. "Discrete-Mode Theory of Quantum-Optical Processing." In Springer Proceedings in Physics, 3–13. Berlin, Heidelberg: Springer Berlin Heidelberg, 1991. http://dx.doi.org/10.1007/978-3-642-76373-1_1.

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Тези доповідей конференцій з теми "QUANTUM MODE COUPLING THEORY"

1

Rabani, Eran. "Quantum Mode Coupling Theory and Path Integral Monte Carlo." In THE MONTE CARLO METHOD IN THE PHYSICAL SCIENCES: Celebrating the 50th Anniversary of the Metropolis Algorithm. AIP, 2003. http://dx.doi.org/10.1063/1.1632139.

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2

Koch, S. W., F. Jahnke, and H. C. Schneider. "Theory of Semiconductor Microcavities and Lasers." In Quantum Optoelectronics. Washington, D.C.: Optica Publishing Group, 1995. http://dx.doi.org/10.1364/qo.1995.qfb1.

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Анотація:
A fully quantum mechanical theory for the coupled electron-hole-pair and photon dynamics of semiconductor microcavity systems is presented. Based on a nonequilibrium Green’s functions approach, the carrier system is described by a generalized Boltzmann equation which includes contributions for carrier generation, carrier scattering by other carriers and phonons, as well as the spontaneous and stimulated recombination. The photon dynamics is described in terms of coupling to the carriers as well as by the mode confinement through the cavity. The many-body Coulomb effects are included on the level of a screened Hartree-Fock approximation.
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3

Jie Li, Hu Cang, Hans C. Andersen, and M. D. Fayer. "Dynamics of nematogens in isotropic phase: A mode coupling theory description." In 2006 Conference on Lasers and Electro-Optics and 2006 Quantum Electronics and Laser Science Conference. IEEE, 2006. http://dx.doi.org/10.1109/cleo.2006.4628950.

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4

Stoffer, Remco. "Comparison of Coupled Mode Theory and FDTD Simulations of Coupling between Bent and Straight Optical Waveguides." In MICRORESONATORS AS BUILDING BLOCKS FOR VLSI PHOTONICS: International School of Quantum Electronics, 39th Course. AIP, 2004. http://dx.doi.org/10.1063/1.1764029.

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5

Arakawa, Y., A. Ishikawa, M. Nishioka, and C. Weisbuch. "Quantum Microcavities and Quantum Well Excitons : An Optimum System For Strong Optical Coupling." In Quantum Optoelectronics. Washington, D.C.: Optica Publishing Group, 1993. http://dx.doi.org/10.1364/qo.1993.qwa.3.

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Several approaches are being attempted to obtain narrow spectral lines and/or controlled spontaneous emission on localized (impurity ions) or delocalized crystal excitations (free electron-hole pairs, excitons). A first way is to quantize electron motion, in an increasing manner in 1, 2 or 3 dimensions, in structures called quantum well,s wires or dots structures. While the approach to quantum wires and dots is being pursued since about 10 years, it did not yield so far any convincing improvement of the optical and optoelectronics properties of solids, in the same way as quantum wells did when compared to “traditional” bulk materials. Another, more recent approach is to remark that broad emission lines and isotropic emission (in the broad sense) are obtained because there is a 3D continuum of photon states available which allow transitions at any direction and energy at which a suitable electronic excitation of the crystal is present. One of the approaches to restrict the available photonic states is that of the photonic bandgap materials, in which the material (more precisely its optical constants) is modulated in all three directions in order to open energy gaps in the propagation of optical waves, identically to the energy gap opening of electron states in solids due to the periodic ion potential. A second way is to bury the light-emitting material in an optical cavity, such that optical modes are separated by more than the emission linewidth. In such a case emission will only occur into one optical mode, with a linewidth detemined by the mode linewidth, and all energy-unmatched crystal excitations will reach this single desexcitation mode through energy and momentum relaxation, as far as non-radiative recombination is negligible.
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6

Weinert-Rączka, Ewa, and Marek Wichtowski. "Mode Coupling by Photorefractive Grating in Multiple Quantum Well Slab Waveguide." In Nonlinear Guided Waves and Their Applications. Washington, D.C.: OSA, 2002. http://dx.doi.org/10.1364/nlgw.2002.nlmd13.

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7

Novotný, Tomáš. "An exactly solvable model of quantum relaxation: Check of the modified Davies weak coupling theory." In QUANTUM LIMITS TO THE SECOND LAW: First International Conference on Quantum Limits to the Second Law. AIP, 2002. http://dx.doi.org/10.1063/1.1523789.

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8

Deppe, D. G., D. L. Huffaker, H. Deng, J. Shin, and Q. Deng. "Spontaneous Emission Coupling to the Lasing Mode in a Fabry-Perot Microcavity with High Contrast AlxOy/GaAs Bragg Reflectors." In Quantum Optoelectronics. Washington, D.C.: Optica Publishing Group, 1995. http://dx.doi.org/10.1364/qo.1995.qthe6.

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Анотація:
There has been recent interest in studies of the influence of controlled spontaneous emission on the operating characteristics of lasers and light emitting diodes. Most cavity designs used in such work can be distinguished as either planar and of the Fabry-Perot type, or as possessing additional confinement in the lateral direction. For both cavity types the mirror design based on distributed Bragg reflectors (DBRs) plays an important role. Since the actual cavity length is set by light penetration into the mirrors, both the cavity length and the mirror reflectivity are set by the DBR design, which in turn sets the lateral mode profile for the planar cavity. In this talk we will present data characterizing the operation of a Fabry-Perot microcavity laser fabricated using high contrast DBRs of AlxOy/GaAs. The mirrors are formed by the selective conversion of AlAs into AlxOy using "wet oxidation" [1], resulting in the laser structure as illustrated in Fig.1. Four AlxOy/GaAs pairs are used on both the top and bottom (substrate) sides to form the laser cavity. In the actual laser cavity the oxidized mesa as illustrated in Fig.1 is 100μm in diameter while the lasing mode area is less than 10μm, so that the laser cavity is in fact planar. The resulting lasing characteristics of this cavity with high contrast DBRs are compared with those of a similar planar cavity design which uses the more typical AlAs/GaAs Bragg reflectors. For this second laser the upper reflector consists of sixteen pairs of AlAs/GaAs while the lower reflector (substrate side) consists of twenty-four pairs of AlAs/GaAs.
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9

Persans, P. D., and An Tu. "Electron-phonon coupling in II–VI quantum dots." In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1991. http://dx.doi.org/10.1364/oam.1991.wt2.

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The shift in electronic energy levels is the most striking effect when semiconductor particles are reduced in dimension into the quantum dot regime but there are other effects that may also be important in the use of quantum dot materials for nonlinear optics. In this paper we discuss how the interaction between electronic quasiparticles (such as excitons) and phonons is altered as particle dimensions are reduced. Phonons can be confined if the matrix for the quantum dots has no mode at the phonon energy; polaritons may also be quantized. The wavevector of both phonons and electronic quasiparticles is ill-defined to the extend of 1/d, the size of the particle. This uncertainty in wavevector should enhance the coupling between electronic states and phonons.
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10

Barnes, M. D., N. Lermer, W. B. Whitten, J. M. Ramsey, and S. Arnold. "Fluorescence lifetimes of Oriented Molecules in Microdroplets." In Quantum Optoelectronics. Washington, D.C.: Optica Publishing Group, 1997. http://dx.doi.org/10.1364/qo.1997.qthb.5.

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Анотація:
Over the last several years there has been considerable interest in the properties of atomic resonance fluorescence in an optical cavity with a primary dimension comparable to the relevant transition wavelength.1 In particular, there has been great interest in the realization of strong atom-cavity coupling2 and the suppression of spontaneous emission into "free-space" modes. However, an important but poorly understood issue relevant to low- or zero-threshold condensed phase optical devices is the nonradiative coupling of the emitting species to a thermal bath. Unlike experiments involving dilute atomic beams where the transition is well defined and broadening is negligible, coupling to a thermal bath induces spectral broadening which is usually much larger than the cavity resonance width and may often exceed the cavity mode spacing. Interesting examples of such systems are solvated dyes whose condensed phase dynamics are well known and characterized. To date, several studies have been made on fluorescence properties of solvated dyes in microcavities,3,4,5 however additional complexities such as spatial and orientational averaging have obscured to some extent the connection between radiative and nonradiative processes in such systems. We discuss the observation of spontaneous emission rate modification (both enhancement and apparent suppression) for molecular species in a microcavity where both the molecular position and transition moment orientation are well defined.6 These experiments serve as an interesting test case of molecule-cavity systems in which the emitting species is nonradiatively coupled to a thermal bath.
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