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Dissertations / Theses on the topic 'Strongly interacting system'

Author: Grafiati

Published: 4 June 2021

Last updated: 10 March 2023

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1

Nguyen, Tien Vinh. "Construction of dynamics with strongly interacting for non-linear dispersive PDE (Partial differential equation)." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLX024/document.

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Cette thèse est consacrée à l’étude des propriétés dynamiques des solutions de type soliton d'équations aux dérivées partielles (EDP) dispersives non linéaires. `A travers des exemples-type de telles équations, l'équation de Schrödinger non-linéaire (NLS), l'équation de Korteweg-de Vries généralisée (gKdV) et le système de Schrödinger, on traite du comportement des solutions convergeant en temps grand vers des sommes de solitons (multi-solitons). Dans un premier temps, nous montrons que dans une configuration symétrique, avec des interactions fortes, le comportement de séparation des solitons

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2

Kang, Daekyoung. "Efimov Physics in Fermionic Lithium atoms." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1313079946.

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3

Hamsen, Christoph [Verfasser], Gerhard [Akademischer Betreuer] Rempe, Jonathan J. [Gutachter] Finley, Gerhard [Gutachter] Rempe, and Tracy [Gutachter] Northup. "Interacting Photons in a Strongly Coupled Atom-Cavity System / Christoph Hamsen ; Gutachter: Jonathan J. Finley, Gerhard Rempe, Tracy Northup ; Betreuer: Gerhard Rempe." München : Universitätsbibliothek der TU München, 2017. http://d-nb.info/1150399155/34.

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4

NAVA, MARCO. "TWO DIMENSIONAL AND NOVEL QUASI TWO DIMENSIONAL QUANTUM LIQUIDS." Doctoral thesis, Università degli Studi di Milano, 2013. http://hdl.handle.net/2434/216307.

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In this thesis we have used Quantum Monte Carlo techniques to study two systems that can be regarded as the archetype for neutral strongly interacting systems: 4He, and its fermionic counterpart 3He.More specifically, we have used the Path Integral Ground State and the Path Integral Monte Carlo methods to study a system of two dimensional 3He (2d-3He) and a system of 4He adsorbed on Graphene-Fluoride (GF) and Graphane (GH) at both zero and finite temperature. The purpose of the study of 4He on GF (GH) was the research of new physical phenomena, whereas in the case of 2d-3He it was the a

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5

Reja, Sahinur. "Strong electron-phonon interactions in some strongly correlated systems." Thesis, University of Cambridge, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.648367.

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6

Jäckel, Jörg. "Effective actions for strongly interacting fermionic systems." [S.l. : s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=968788351.

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7

Kasztelan, Christian. "Strongly Interacting Quantum Systems out of Equilibrium." Diss., lmu, 2010. http://nbn-resolving.de/urn:nbn:de:bvb:19-124827.

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8

Pugh, Emma. "Pressure studies on strongly interacting electron systems." Thesis, University of Cambridge, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.621542.

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9

O'Connell, Heath B. "Vector meson models of strongly interacting systems /." Title page, abstract and table of contents only, 1996. http://web4.library.adelaide.edu.au/theses/09PH/09pho175.pdf.

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10

Fearon, Michael. "Theoretical studies of strongly interacting fine particle systems." Thesis, University of Central Lancashire, 1990. http://clok.uclan.ac.uk/20347/.

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A theoretical analysis of the time dependent behaviour of a system of fine magnetic particles as a function of applied field and temperature was carried out. The model used was based on a theory assuming Neel relaxation with a distribution of particle sizes. This theory predicted a linear variation of 5max with temperature and a finite intercept, which is not reflected by experimental observations. The remanence curves of strongly interacting fine-particle systems were also investigated theoretically. It was shown that the Henkel plot of the dc demagnetisation remanence vs the isothermal reman

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11

Antonio, R. G. "Quantum computation and communication in strongly interacting systems." Thesis, University College London (University of London), 2015. http://discovery.ucl.ac.uk/1469437/.

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Each year, the gap between theoretical proposals and experimental endeavours to create quantum computers gets smaller, driven by the promise of fundamentally faster algorithms and quantum simulations. This occurs by the combination of experimental ingenuity and ever simpler theoretical schemes. This thesis comes from the latter perspective, aiming to find new, simpler ways in which components of a quantum computer could be built. We first search for ways to create quantum gates, the primitive building blocks of a quantum computer. We find a novel, low-control way of performing a two-qubit gate

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12

Thomson, Steven. "The effects of disorder in strongly interacting quantum systems." Thesis, University of St Andrews, 2016. http://hdl.handle.net/10023/9441.

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This thesis contains four studies of the effects of disorder and randomness on strongly correlated quantum phases of matter. Starting with an itinerant ferromagnet, I first use an order-by-disorder approach to show that adding quenched charged disorder to the model generates new quantum fluctuations in the vicinity of the quantum critical point which lead to the formation of a novel magnetic phase known as a helical glass. Switching to bosons, I then employ a momentum-shell renormalisation group analysis of disordered lattice gases of bosons where I show that disorder breaks ergodicity in a no

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13

Klugkist, Joost André. "Mechanisms for photonic switching in systems of strongly interacting dipoles." [S.l. : [Groningen : s.n.] ; University Library Groningen] [Host], 2008. http://irs.ub.rug.nl/ppn/306046253.

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14

Akhanjee, Shimul. "Classical and quantum aspects of strongly interacting one-dimensional systems." Diss., Restricted to subscribing institutions, 2008. http://proquest.umi.com/pqdweb?did=1679376391&sid=1&Fmt=2&clientId=1564&RQT=309&VName=PQD.

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15

SANGIOVANNI, GIORGIO. "The electron-phonon interaction in strongly correlated electron systems." Doctoral thesis, La Sapienza, 2004. http://hdl.handle.net/11573/917137.

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16

Grover, Tarun Ph D. Massachusetts Institute of Technology. "Applied fractionalization : quantum phases and phase transitions of strongly interacting systems." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/68973.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 2010.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 131-136).<br>Strongly correlated systems present interesting challenges in condensed matter physics. On the one hand, the theoretical work in the last two decades suggests that strong interactions may lead to new phases and phase transitions of matter that don't fit paradigms such as Fermi liquid theory or Landau's theory of phase transitions. On the other hand, there are actual materials which are undoubtedly governed by strong int

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17

Yan, Mi. "Quantum Dynamics of Strongly-Interacting Bosons in Optical Lattices with Disorder." Diss., Virginia Tech, 2019. http://hdl.handle.net/10919/87432.

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Ultracold atoms in optical lattices offer an important tool for studying dynamics in many-body interacting systems in a pristine environment. This thesis focuses on three theoretical works motivated by recent optical lattice experiments. In the first, we theoretically study the center of mass dynamics of states derived from the disordered Bose-Hubbard model in a trapping potential. We find that the edge states in the trap allow center of mass motion even with insulating states in the center. We identify short and long-time mechanisms for edge state transport in insulating phases. We also argu

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18

Kovacs, E., and Z. Gulacsi. "Exact ground states for quasi 1D systems with hubbard interaction." Thesis, Sumy State University, 2011. http://essuir.sumdu.edu.ua/handle/123456789/20658.

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Using a positive semidefinite operator technique we deduced exact ground states for a modified diamond chain described by a non-integrable Hubbard model with on-site repulsion. Our results are valid for arbitrary length of the chain and strength of the Hubbard interaction. For the analyzed quasi 1D chain structure we found that two flat bands are present in the bare band structure of the system, both for zero and for a fixed value of magnetic field. We obtained ground states of nonmagnetic and ferromagnetic insulator type and studied their physical properties. When you are citing the document,

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19

Sica, G. "Electron-electron and electron-phonon interactions in strongly correlated systems." Thesis, Loughborough University, 2013. https://dspace.lboro.ac.uk/2134/12194.

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In this work we investigate some aspects of the physics of strongly correlated systems by taking into account both electron-electron and electron-phonon interactions as basic mechanisms for reproducing electronic correlations in real materials. The relevance of the electron-electron interactions is discussed in the first part of this thesis in the framework of a self-consistent theoretical approach, named Composite Operator Method (COM), which accounts for the relevant quasi-particle excitations in terms of a set of composite operators that appear as a result of the modification imposed by the

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20

Wynen, Jan-Lukas [Verfasser]. "Strongly interacting few-body systems from lattice stochastic methods / Jan-Lukas Wynen." Bonn : Universitäts- und Landesbibliothek Bonn, 2020. http://d-nb.info/1219140198/34.

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21

Botzung, Thomas. "Study of strongly correlated one-dimensional systems with long-range interactions." Thesis, Strasbourg, 2019. http://www.theses.fr/2019STRAF062.

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Durant cette thèse, nous étudions des systèmes unidimensionnels avec des couplages longue-portée. Dans la première partie, nous démontrons que ces couplages entraînent une décroissance algébrique des corrélations dans des fils quantiques désordonnés. Deuxièmement, nous analysons un modèle étendu de Hubbard où les particules interagissent via un potentiel « soft-core » générant de nouvelles phases exotiques. Dans le troisième chapitre, nous démontrons que restaurer l’extensivité a une influence sur les propriétés de basse énergie de modèle quantique dans la limite thermodynamique. Finalement, n

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22

Botzung, Thomas <1993&gt. "Study of strongly correlated one-dimensional systems with long-range interactions." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amsdottorato.unibo.it/9485/1/Botzung_Thomas_2019_PdH_tesi.pdf.

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During this Ph.D, we studied one-dimensional systems with long-range couplings. In the first part, we demonstrate that power-law couplings lead to an algebraic decay of correlations at long distances in disordered quantum wires. In the second chapter, we analyzed an extended Hubbard model where particles interact via a finite-range potential that induces frustration and new exotic phases. In the third chapter, we demonstrated that restoring energy extensivity has an influence on the low-energy properties of quantum model in the thermodynamic limit. Finally, we provide preliminary results on th

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23

Vilardi, Demetrio [Verfasser], and Walter [Akademischer Betreuer] Metzner. "Functional renormalization group for strongly interacting Fermi systems / Demetrio Vilardi ; Betreuer: Walter Metzner." Stuttgart : Universitätsbibliothek der Universität Stuttgart, 2019. http://d-nb.info/1183678509/34.

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24

Wendt, Kyle Andrew. "Advances in the Application of the Similarity Renormalization Group to Strongly Interacting Systems." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1375205117.

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25

Yudin, Dmitry. "Trends in Magnetism : From Strong Correlations to “-onics” Technology." Doctoral thesis, Uppsala universitet, Materialteori, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-238177.

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Despite of enormous progress in experimental nanophysics theoretical studies of low-dimensional electron systems still remains a challenging task. Indeed, most of the structures are strongly correlated, so that an effective perturbative treatment is impossible due to the lack of a small parameter. The problem can be partly solved within the dynamical mean-field theory (DMFT) paradigm, nevertheless the correlations in physically relevant high-temperature superconductors are of purely non-local nature. The recently developed dual fermion approximation, combining field-theoretical diagram techniq

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26

Honer, Jens Daniel [Verfasser], and Hans Peter [Akademischer Betreuer] Büchler. "Strongly interacting many-body systems in cold atomic gases / Jens Daniel Honer. Betreuer: Hans Peter Büchler." Stuttgart : Universitätsbibliothek der Universität Stuttgart, 2013. http://d-nb.info/1037956052/34.

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27

Mowat, Andrew Gavin Bradford. "Modelling of non-linear aeroelastic systems using a strongly coupled fluid-structure-interaction methodology." Diss., University of Pretoria, 2011. http://hdl.handle.net/2263/30521.

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The purpose of this study was to develop a robust fluid-structure-interaction (FSI) technology that can accurately model non-linear flutter responses for sub- and transonic fluid flow. The Euler equation set governs the fluid domain, which was spatially discretised by a vertex-centred edge-based finite volume method. A dual-timestepping method was employed for the purpose of temporal discretisation. Three upwind schemes were compared in terms of accuracy, efficiency and robustness, viz. Roe, HLLC (Harten-Lax-Van Leer with contact) and AUSM+-up Advection Up-stream Splitting Method). For this pu

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28

Pietikäinen, I. (Iivari). "Strong radiation-matter interaction in a driven superconducting quantum system." Doctoral thesis, Oulun yliopisto, 2019. http://urn.fi/urn:isbn:9789526222479.

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Abstract In this thesis we study the interaction between radiation and matter using superconducting circuits that behave analogously with the conventional photon-atom interaction in quantum optics. The research is done with a system consisting of a waveguide resonator (radiation) strongly coupled to a transmon device (matter). We focus on the phenomena caused by strong coupling between the radiation and matter, and by driving the resonator to higher excited states with a strong monochromatic radiation. These have been studied little in the traditional radiation-matter systems. Increasing the s

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29

Malpetti, Daniele. "Thermodynamics of strongly interacting bosons on a lattice : new insights and numerical approaches." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSEN065/document.

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Les atomes froids dans les réseaux optiques permettent d'avoir un contrôle sans précédent des états a N-corps fortement corrélés. Pour cette raison, ils représentent un excellent outil pour l'implémentation d'un « simulateur quantique », utile pour réaliser de manière expérimentale de nombreux hamiltoniens de systèmes d'intérêt physique. En particulier, ils rendent possible la création de champs de jauge artificiels; ces derniers permettant d'accéder à la physique du magnétisme frustré. Dans ce travail, il s'agit de s'intéresser à la thermodynamique des atomes froids, en abordant ce sujet de m

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30

Dungate, David George. "A theoretical study of the magnetic and superconducting properties of strongly interacting d and f electron systems." Thesis, University of Cambridge, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.239615.

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31

Sekihara, Takayasu. "Strong interactions in antikaon-nuclear systems based on chiral symmetry." 京都大学 (Kyoto University), 2011. http://hdl.handle.net/2433/142372.

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32

Mukherjee, Rick. "Strong interactions in alkaline-earth Rydberg ensembles." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-157228.

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Ultra-cold atoms in optical lattices provide a versatile and robust platform to study fundamental condensed-matter physics problems and have applications in quantum optics as well as quantum information processing. For many of these applications, Rydberg atoms (atoms excited to large principal quantum numbers) are ideal due to its long coherence times and strong interactions. However, one of the pre-requisite for such applications is identical confinement of ground state atoms with Rydberg atoms. This is challenging for conventionally used alkali atoms. In this thesis, I discuss the potenti

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33

Shotter, Martin David. "The development of techniques to prepare and probe at single atom resolution strongly interacting quantum systems ot uitracold atoms." Thesis, University of Oxford, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.526117.

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34

Morée, Jean-Baptiste. "Calcul ab initio de l'interaction effective entre électrons f pour les lanthanides et les oxydes d'actinides." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLS520/document.

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Les systèmes à électrons fortement corrélés sont d’intérêt particulier pour le calcul ab initio, cherchant à modéliser ces systèmes à partir des premiers principes. La théorie de la fonctionnelle de la densité associée à une prise en compte des corrélations locales en DFT+U ou en DFT+DMFT, permet de reproduire qualitativement la physique de ces systèmes. Cependant, ces méthodes font intervenir les paramètres d’interaction effective de Hubbard U et de Hund J. Ces derniers peuvent eux-mêmes être calculés de manière ab initio, notamment avec l’approximation de phase aléatoire contrainte (cRPA), o

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35

Dobrautz, Werner [Verfasser], and Ali [Akademischer Betreuer] Alavi. "Development of full configuration interaction quantum Monte Carlo methods for strongly correlated electron systems / Werner Dobrautz ; Betreuer: Ali Alavi." Stuttgart : Universitätsbibliothek der Universität Stuttgart, 2019. http://d-nb.info/1197056459/34.

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36

Romanovsky, Igor Alexandrovich. "Novel properties of interacting particles in small low-dimensional systems." Diss., Available online, Georgia Institute of Technology, 2006, 2006. http://etd.gatech.edu/theses/available/etd-07102006-041659/.

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Thesis (Ph. D.)--Physics, Georgia Institute of Technology, 2007.<br>Landman, Uzi, Committee Member ; Yannouleas, Constantine, Committee Member ; Bunimovich, Leonid, Committee Member ; Chou, Mei-Yin, Committee Member ; Pustilnik, Michael, Committee Member.

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37

Gruenewald, John H. "TUNING THE EFFECTIVE ELECTRON CORRELATION IN IRIDATE SYSTEMS FEATURING STRONG SPIN-ORBIT INTERACTION." UKnowledge, 2017. https://uknowledge.uky.edu/physastron_etds/51.

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The 5d transition metal oxides have drawn substantial interest for predictions of being suitable candidates for hosting exotic electronic and magnetic states, including unconventional superconductors, magnetic skyrmions, topological insulators, and Weyl semimetals. In addition to the electron-electron correlation notable in high-temperature 3d transition metal superconductors, the 5d oxides contain a large spin-orbit interaction term in their ground state, which is largely responsible for the intricate phase diagram of these materials. Iridates, or compounds containing 5d iridium bonded with o

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38

Czischek, Stefanie [Verfasser], and Thomas [Akademischer Betreuer] Gasenzer. "Simulating Strongly Interacting Quantum Spin Systems–From Critical Dynamics Towards Entanglement Correlations in a Classical Artificial Neural Network / Stefanie Czischek ; Betreuer: Thomas Gasenzer." Heidelberg : Universitätsbibliothek Heidelberg, 2019. http://d-nb.info/119790431X/34.

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Mukherjee, Ayon [Verfasser], Stefan [Gutachter] Schramm, and Horst [Gutachter] Stöcker. "A study of hot and dense strongly interacting systems with the quark-hadron chiral parity-doublet model / Ayon Mukherjee ; Gutachter: Stefan Schramm, Horst Stöcker." Frankfurt am Main : Universitätsbibliothek Johann Christian Senckenberg, 2019. http://d-nb.info/1183091591/34.

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40

Yahia, Ghassen. "Etude des interactions d'échange dans les oxydes multiferroïques RMn₂O₅." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLS423/document.

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Les systèmes multiferroïques magnéto-électriques sont des matériaux multifonctionnels très importants du point de vue des applications dans le domaine de l’électronique ou de la spintronique puisqu’ils présentent simultanément des ordres électriques et magnétiques généralement couplés. Ils peuvent donc répondre à la fois à l’application d’un champ magnétique et d’un champ électrique. L’une des familles de multiferroïques magnéto-électriques les plus étudiées est la série RMn₂O₅ où R est une terre rare. Ma thèse porte sur le rôle de la terre rare sur le caractère multiferroïque et sur les propr

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41

Nakib, Protik H. "The Multiconfiguration Time Dependent Hartree-Fock Method for Cylindrical Systems." Thèse, Université d'Ottawa / University of Ottawa, 2013. http://hdl.handle.net/10393/26297.

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Many-body quantum dynamics is a challenging problem that has induced the development of many different computational techniques. One powerful technique is the multiconfiguration time-dependent Hartree-Fock (MCTDHF) method. This method allows proper consideration of electronic correlation with much less computational overhead compared to other similar methods. In this work, we present our implementation of the MCTDHF method on a non-uniform cylindrical grid. With the one-body limit of our code, we studied the controversial topic of tunneling delay, and showed that our results agree with one rec

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42

Hall, Sebastian. "Creating Strong Cross Media Concepts for Museum Exhibitions." Thesis, Umeå universitet, Institutionen för informatik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-73243.

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In this paper I argue that, in an effort to create novel cross media exhibition concepts, museums should use service design. By realigning their organizations and embrace the fact that what they are offering is indeed a service, they can gain a new outlook and generate new ideas about how to create novel cross media exhibition concepts. I also suggest that treating the exhibition in a similar way that film studios treat franchises could help shift the mindset and make it cross media-centric. In order to arrive at these conclusions I performed an observational study and conducted qualitative in

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Bruch, Anton [Verfasser]. "Operating machines at the nanoscale : Effects of electron-electron interactions and strong system-bath coupling on the working principles of electronic nanomachines / Anton Bruch." Berlin : Freie Universität Berlin, 2018. http://d-nb.info/1150704586/34.

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44

Asano, Yasuhiro, Yuki Sawa, Yukio Tanaka, and Alexander A. Golubov. "Odd-frequency pairs and Josephson current through a strong ferromagnet." American Physical Society, 2007. http://hdl.handle.net/2237/11285.

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Khan, Muhammad Sikandar Lal. "Presence through actions : theories, concepts, and implementations." Doctoral thesis, Umeå universitet, Institutionen för tillämpad fysik och elektronik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-138280.

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During face-to-face meetings, humans use multimodal information, including verbal information, visual information, body language, facial expressions, and other non-verbal gestures. In contrast, during computer-mediated-communication (CMC), humans rely either on mono-modal information such as text-only, voice-only, or video-only or on bi-modal information by using audiovisual modalities such as video teleconferencing. Psychologically, the difference between the two lies in the level of the subjective experience of presence, where people perceive a reduced feeling of presence in the case of CMC.

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46

Mora, Christophe. "Systèmes quantiques en interaction : physique mésoscopique et atomes froids." Habilitation à diriger des recherches, Université Paris-Diderot - Paris VII, 2012. http://tel.archives-ouvertes.fr/tel-00712112.

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Le concept de théorie effective, en tant que modèle s'appliquant dans une certaine gamme d'énergie et/ou pour un régime restreint de paramètres, s'est enrichi des idées du groupe de renormalisation qui peut relier deux modèles a priori bien distincts par un changement continu d'échelle. L'intuition physique resurgit, même pour des problèmes d'apparence formelle, où il s'agit bien souvent de deviner les briques élémentaire, les quasiparticules, qui vont façonner le comportement physique, par exemple à basse énergie. Dans cet exposé, je soulignerai la récurrence de ce concept dans mes recherches

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47

Ruess, Frank Joachim Physics Faculty of Science UNSW. "Atomically controlled device fabrication using STM." Awarded by:University of New South Wales. Physics, 2006. http://handle.unsw.edu.au/1959.4/24855.

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We present the development of a novel, UHV-compatible device fabrication strategy for the realisation of nano- and atomic-scale devices in silicon by harnessing the atomic-resolution capability of a scanning tunnelling microscope (STM). We develop etched registration markers in the silicon substrate in combination with a custom-designed STM/ molecular beam epitaxy system (MBE) to solve one of the key problems in STM device fabrication ??? connecting devices, fabricated in UHV, to the outside world. Using hydrogen-based STM lithography in combination with phosphine, as a dopant source, and sil

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48

Chia-HuaChang and 張嘉華. "Spin polarization in strongly interacting one-dimensional system with magnetic focusing." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/35063518866688639831.

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碩士<br>國立成功大學<br>物理學系<br>104<br>There have been many studies of non-interacting one-dimensional system which can be created from two-dimensional electron gas by applying electrostatic confinement which is provided by a voltage applied to split gates. At low electron density, Coulomb potential dominate over the kinetic energy. In order to minimize the Coulomb repulsion, electrons occupy equidistance positions, forming a Wigner crystal. With increasing electron density in Wigner crystal regime, transforming the one-dimensional Wigner crystal into a staggered zig zag chain. Former research has sho

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49

Burovski, Evgeni. "Simulations of strongly-interacting fermion systems." 2007. https://scholarworks.umass.edu/dissertations/AAI3254916.

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A generic scenario of a crossover between weak-coupling and strong-coupling limits of a many-body quantum system is studied. Powerful numerical methods of investigating the strongly correlated regime are developed and applied to answering a number of important questions of the strongly correlated fermions physics. The internal structure of an exciton in an insulating medium is studied throughout the crossover between the (analytically solvable) strong- and weak-coupling limits. In the intermediate regime, accurate results for the exciton ground state are obtained and used to establish the limi

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Nerella, Tejaswi Venumadhav. "The Astrophysics of Strongly Interacting Systems." Thesis, 2016. https://thesis.library.caltech.edu/9139/8/TejaswiNerella2015thesis.pdf.

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<p>This thesis presents investigations in four areas of theoretical astrophysics: the production of sterile neutrino dark matter in the early Universe, the evolution of small-scale baryon perturbations during the epoch of cosmological recombination, the effect of primordial magnetic fields on the redshifted 21-cm emission from the pre-reionization era, and the nonlinear stability of tidally deformed neutron stars.</p> <p>In the first part of the thesis, we study the asymmetry-driven resonant production of 7 keV-scale sterile neutrino dark matter in the primordial Universe at temperatures T

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