Дисертації з теми "Electrodynamical coupling"
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Leeder, Jamie M. "Novel nonlinear processes, higher-order molecular coupling and multiphoton interactions : a quantum electrodynamical formulation." Thesis, University of East Anglia, 2011. https://ueaeprints.uea.ac.uk/39141/.
Повний текст джерелаFlick, Johannes [Verfasser], Claudia [Gutachter] Draxl, Angel [Gutachter] Rubio, and Dieter [Gutachter] Bauer. "Exact nonadiabatic many-body dynamics : electron-phonon coupling in photoelectron spectroscopy and light-matter interactions in quantum electrodynamical density-functional theory / Johannes Flick. Gutachter: Claudia Draxl ; Angel Rubio ; Dieter Bauer." Berlin : Mathematisch-Naturwissenschaftliche Fakultät, 2016. http://d-nb.info/1112595929/34.
Повний текст джерелаHo, Andy C. T. "Imaginary charge quantum electrodynamics : a running coupling analysis." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape15/PQDD_0005/NQ34551.pdf.
Повний текст джерелаRolland, Chloé. "Strong coupling Quantum electrodynamics of a voltage biased Josephson junction." Thesis, Lille 1, 2016. http://www.theses.fr/2016LIL10223/document.
Повний текст джерелаIn this thesis, we investigate the coupling between the charge transport in a quantum conductor and the associated radiation emitted in the electromagnetic environment. In fact, the probabilistic character of the electric transport in this type of conductors generates current fluctuations which dissipate energy in the environment in the form of photons.To study this interaction, we used a circuit in which a Josephson junction is coupled to a microwave resonator and dc voltage biased. When the bias voltage reaches the condition so that the work supplied by the generator when the charge of a Cooper pair passes through the circuit corresponds to the energy of an integer number of photons of the resonator, we observe a dc current of Cooper pairs associated with the emission of radiation in the resonator. This radiation is then collected in a microwave measuring line. By carefully engineering high impedance resonators based on planar inductances, we were able to reach the strong coupling regime and observed the dramatic effects of this light-matter interaction. First, the strong coupling regime favors multi-photon processes and we observed up to the simultaneous emission of nine photons by a single tunneling Cooper pair. In addition, using a Hanbury-Brown and Twiss type, we were able to measure the statistics of the emitted photons. We have demonstrated that the feedback of the environment on the transport dynamics creates a non-classical source of antibunched photons, in agreement with the theoretical predictions
McNeill, Daniel Owen. "Strong coupling aspects of (2+1) dimensional gauge field theories." Thesis, University of Oxford, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.244631.
Повний текст джерелаBegley, Stephen Patrick. "Optimisation of the coupling of ion strings to an optical cavity." Thesis, University of Sussex, 2016. http://sro.sussex.ac.uk/id/eprint/61884/.
Повний текст джерелаWilder, Frederick Durand. "The Non-Linear Electrodynamic Coupling Between the Solar Wind, Magnetosphere and Ionosphere." Diss., Virginia Tech, 2011. http://hdl.handle.net/10919/26586.
Повний текст джерелаPh. D.
Musso, Andrea. "Losses in electrodynamic transient in superconducting Rutherford cables." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amslaurea.unibo.it/12875/.
Повний текст джерелаChervy, Thibault. "Strong coupling regime of cavity quantum electrodynamics and its consequences on molecules and materials." Thesis, Strasbourg, 2017. http://www.theses.fr/2017STRAF033/document.
Повний текст джерелаThis thesis presents an exploratory study of several aspects of strong light-matter coupling in molecular materials. Different properties inherited from such a coupling are demonstrated, opening the way to numerous applications, ranging from energy transfer to the generation of non-linear optical signals and to the development of chiral polaritonic networks. Through the topics covered, the idea of a light-matter coupling strength competing with the different frequencies of relaxation of the molecules proves to be crucial. Thus, the predominance of the coherent coupling to the electromagnetic field appears as a new mean of modifying the quantum properties of molecular systems, opening the way to a new chemistry of materials in optical cavities
Tracy, Brian David. "Lunar Tidal Effects in the Electrodynamics of the Low-Latitude Ionosphere." DigitalCommons@USU, 2013. https://digitalcommons.usu.edu/etd/1968.
Повний текст джерелаDartiailh, Matthieu. "Cavity quantum electrodynamics with a single spin : coherent spin-photon coupling and ultra-sensitive detector for condensed matter." Thesis, Paris Sciences et Lettres (ComUE), 2017. http://www.theses.fr/2017PSLEE035/document.
Повний текст джерелаThis thesis work is centered around two key aspects of quantum technologies: quantum information processing and quantum sensing. It builds up onto the microwave light toolbox, developed in circuit quantum electrodynamics, to investigate the properties of mesosocopic circuits. Those circuits, made out here of carbon nanotubes, can be designed to act as quantum bits of information or as condensed matter model system and this thesis explore both aspects. The realization of a coherent spin-photon interface illustrates the first one. The experiment relies on ferromagnetic contacts to engineer an artificial spin-orbit coupling in a double quantum dot. This coupling hybridizes the spin and the charge degree of freedom of the electron in this circuit. By embedding this circuit into a microwave cavity, whose electrical field can be coupled to the charge, we realize an artificial spin-photon interface. A second project, started during this thesis, focuses on using quantum dot circuits as model systems. This project consists in coupling, via a microwave cavity, a superconducting qubit, that will serve as a delicate probe, and single quantum dot circuit. Such a circuit can display several behaviors including the Kondo effect which is intrinsically a many-body effect. In this work, we present both a theoretical study of some possible outcomes of this experiment, and experimental developments. Finally, a theoretical proposition to detect the self-adjoint character of Majorana fermions using a microwave cavity, is presented
Baust, Alexander Theodor [Verfasser], Rudolf [Akademischer Betreuer] Gross, and Jonathan J. [Akademischer Betreuer] Finley. "Tunable Coupling and Ultrastrong Interaction in Circuit Quantum Electrodynamics / Alexander Theodor Baust. Gutachter: Rudolf Gross ; Jonathan J. Finley. Betreuer: Rudolf Gross." München : Universitätsbibliothek der TU München, 2015. http://d-nb.info/1072758237/34.
Повний текст джерелаBaust, Alexander Theodor Verfasser], Rudolf [Akademischer Betreuer] [Gross, and Jonathan J. [Akademischer Betreuer] Finley. "Tunable Coupling and Ultrastrong Interaction in Circuit Quantum Electrodynamics / Alexander Theodor Baust. Gutachter: Rudolf Gross ; Jonathan J. Finley. Betreuer: Rudolf Gross." München : Universitätsbibliothek der TU München, 2015. http://nbn-resolving.de/urn:nbn:de:bvb:91-diss-20150611-1252065-1-0.
Повний текст джерелаSoykal, Öney Orhunç. "Coherent strong field interactions between a nanomagnet and a photonic cavity." Diss., University of Iowa, 2010. https://ir.uiowa.edu/etd/742.
Повний текст джерелаCubaynes, Tino. "Shaping the spectrum of carbon nanotube quantum dots with superconductivity and ferromagnetism for mesoscopic quantum electrodynamics." Thesis, Sorbonne université, 2018. http://www.theses.fr/2018SORUS195/document.
Повний текст джерелаIn this thesis, we study carbon nanotubes based quantum dot circuits embedded in a microwave cavity. This general architecture allows one to simultaneously probe the circuit via quantum transport measurements and using circuit quantum electrodynamics techniques. The two experiments realized in this thesis use metallic contacts of the circuit as a resource to engineer a spin sensitive spectrum in the quantum dots. The first one is a Cooper pair splitter which was originally proposed as a source of non local entangled electrons. By using cavity photons as a probe of the circuit internal dynamics, we observed a charge transition dressed by coherent Cooper pair splitting. Strong charge-photon coupling in a quantum dot circuit was demonstrated for the first time in such a circuit. A new fabrication technique has also been developed to integrate pristine carbon nanotubes inside quantum dot circuits. The purity and tunability of this new generation of devices has made possible the realization of the second experiment. In the latter, we uses two non-collinear spin-valves to create a coherent interface between an electronic spin in a double quantum dot and a photon in a cavity. Highly coherent spin transitions have been observed. We provide a model for the decoherence based on charge noise and nuclear spin fluctuations
Mosqueiro, Thiago Schiavo. "Transições ópticas em heteroestruturas semicondutoras Zincblende com duas sub-bandas." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/76/76131/tde-20042011-154055/.
Повний текст джерелаIn this work, I present an alternative derivation of the conduction band effective hamiltonian for Zincblende semiconductor heterostructures. Starting from the 8×8 Kane model and envelope function approximation, this effective hamiltonian was obtained by means of a linearization in the eigenenergy-dependent denominators present the conduction band equation, under the hypothesis that the energy gap is bigger than any other energy difference in the system (true for mostly every Zincblende semiconductor bulk or heterostructure). Based on a previous procedure1,3, I have developed a more general procedure that implements sistematicaly (i) this linearization and (ii) renormalizes the conduction band spinor using the valence bands, both (i) and (ii) up to second order in the inverse of the energy gap. This procedure is identical to the expansion in power series of the inverse of the light speed used to derive non-relativistic approximations of the Dirac equation. One advantage of this procedure is the generality of the potentials adopted in our derivation: the same results hold for quantum wells, wires and dots. I show the consequences of each term of this hamiltonian for the electron eigenstates in retangular wells, including novel spin-independent terms (Darwin and linear momentumelectric field couplings). These resulties agree with previous works4. In order to study conduction band optical transitions, I show that the minimal substitution can be performed directly in the Kane hamiltonian if the external fields vary slowly (at least, as slowly as the envelope functions). Repeating the linearization of the energy denominators, I derive a new effective hamiltonian, up to second order in the inverse of the energy gap, with electron-photons couplings. One of these couplings, induced exclusively by the valence bands, gives rise to optical transitions mediated by the electron spin. This spin-assisted coupling enable optically-induced spin flipps in conduction subband transitions, which can be useful in the construction of spintronic devices. Finaly, the spin-assisted transitions rates show saturation and lines of maxima and minima in the reciprocal lattice. I hope that these optical couplings can be of any help in the observation of interesting effects induced by the intra and intersubband spin-orbit coupling.
Reich, Felix Alexander [Verfasser], Wolfgang H. [Akademischer Betreuer] Müller, Wolfgang H. [Gutachter] Müller, and Ingo [Gutachter] Müller. "Coupling of continuum mechanics and electrodynamics : an investigation of electromagnetic force models by means of experiments and selected problems / Felix Alexander Reich ; Gutachter: Wolfgang H. Müller, Ingo Müller ; Betreuer: Wolfgang H. Müller." Berlin : Technische Universität Berlin, 2017. http://d-nb.info/1156178428/34.
Повний текст джерелаDa, silva Antonio. "Theoretical determination of optical properties for sapphire doped with titanium from its microscopy and analysis of its capabilities for laser without population inversion." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLX075/document.
Повний текст джерелаThis presentation is split into two main parts. In the first, we estimate photo-physical constants of titanium doped sapphire from a simple analytical model using a Huang-Rhys theory for the determination of the spectral profile of simple bands and from a realistic hypothesis of superposition of the latter. We define a formula for the total refractive index of Ti:sapphire as a function of dopant concentration. In a second part, we evaluate, according to the verification of a concept, the laser capability without population inversion for a doped crystal with low symmetry. We support our demonstration by establishing a generalized laser threshold condition. This concept would be a technological breakthrough in the field of large doped crystals and has not yet been investigated by the community
Contamin, Lauriane. "Mise en évidence de textures de spin synthétiques par des mesures de transport et de champ microonde." Thesis, Paris Sciences et Lettres (ComUE), 2019. http://www.theses.fr/2019PSLEE020.
Повний текст джерелаIn this thesis, we have studied carbon nanotube-based nanocircuits integrated in a microwave cavity architecture. Our device is compatible with the simultaneous measurement of both the current through the nanocircuit and the frequency shift of the cavity. These two signals give complementary information about the device. In the two experiments presented in this thesis, the carbon nanotube was positioned above a magnetic material containing several magnetization domains. The resulting magnetic stray field’s axis oscillates along the carbon nanotube length. For the confined electrons, this is equivalent to both a synthetic spin-orbit interaction and a Zeeman effect. This synthetic effect is evidenced in two ways. In a first experiment, we have measured the evolution of the nanotube’s energy levels when the magnetic material is progressively magnetized by an external magnetic field, thus destroying the oscillations of the stray field. In this experiment, the carbon nanotube had a very transparent contact to a superconducting metal, in addition to the synthetic spin-orbit interaction and Zeeman effect. These ingredients are a pre-requisite to observe Majorana quasiparticles in a one-dimensional nanoconductor. Those quasiparticles are under intense study for their potential use in quantum computing. In the second experiment, we have realized a double quantum dot in which each dot similarly lays above an oscillating magnetic field. The internal transitions of this DQD are measured with the microwave cavity signal. We evidenced a strong dispersion of the energy of the double quantum dots’ internal transitions with a small external magnetic field. This dispersion can be explained by a Zeeman effect in which the Landé factor, g, has been strongly renormalized by the synthetic spin-orbit interaction
Mondal, Ritwik. "Relativistic theory of laser-induced magnetization dynamics." Doctoral thesis, Uppsala universitet, Materialteori, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-315247.
Повний текст джерелаFlottat, Thibaut. "Bosons couplés à des spins 1/2 sur réseau." Thesis, Université Côte d'Azur (ComUE), 2016. http://www.theses.fr/2016AZUR4080/document.
Повний текст джерелаStrongly correlated systems, where new surprising phases of matter may appear both in the context of ultra-cold atoms and cavity quantum electrodynamics, are the focus of intense experimental and theoritical activity. In this thesis we present a study of two models of bosons with two or zero internal states, that is to say spin-1/2 or spin-0 bosons. These particles can move around a lattice, and they are locally coupled to immobile spins 1/2. Our interest was to determine the ground state phase diagram, study phase properties and quantum phase transitions. We used two methods: an approximate one using a mean field approach and the other using quantum Monte-Carlo simulations, which provides numerically exact results. The first model, namely the bosonic Kondo lattice model, is in the context of ultra-cold atoms in optical lattices. We found that its physics is close to that of the Bose-Hubbard model, exhibiting Mott and superfluid phases. The local coupling strengthens the insulating behaviour of the system and magnetism emerges through indirect or direct coupling between bosons. Thermal effects, inherent in experiments, are also studied. The second model, which is in the context of light-matter interaction, describes a situation of an ultra-strong coupling between spin-0 bosons (photons) and local spins 1/2 (two levels atoms) and is known as the Rabi lattice model. The phase diagram generally consists of only two phases: a coherent phase and a compressible incoherent one. The locals
Caprez, Adam Preston. "Tests of the Aharonov-Bohm effect." 2009. http://proquest.umi.com/pqdweb?did=1694329131&sid=4&Fmt=2&clientId=14215&RQT=309&VName=PQD.
Повний текст джерелаTitle from title screen (site viewed June 26, 2009). PDF text: x, 153 p. : ill. (some col.) ; 9 Mb. UMI publication number: AAT 3350442. Includes bibliographical references. Also available in microfilm and microfiche formats.
Travis, Kort Alan. "Optical scattering from nanoparticle aggregates." Thesis, 2010. http://hdl.handle.net/2152/ETD-UT-2010-12-2247.
Повний текст джерелаtext