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Dissertations / Theses on the topic 'Dynamical quantum phase transitions'

Author: Grafiati
Published: 4 June 2021
Last updated: 27 April 2022

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1

Hines, Andrew Peter. "Entanglement, dynamical bifurcations and quantum phase transitions /." [St. Lucia, Qld.], 2005. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe19792.pdf.

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2

Macieszczak, Katarzyna. "Metrology, metastability and dynamical phase transitions in open quantum systems." Thesis, University of Nottingham, 2017. http://eprints.nottingham.ac.uk/39811/.

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In this thesis we explore aspects of dynamics of open quantum systems related to coherence and quantum correlations - necessary resources for enhanced quantum metrology and quantum computation. We first discuss limits to the precision of parameter estimation when using a quantum system in the presence of noise. To this end we introduce a variational principle for the quantum Fisher information (QFI) bounding the estimation errors of any measurement, which motivates an efficient iterative algorithm for finding optimal system preparations for noisy estimation experiments. Furthermore, we investi
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3

van, Horssen Merlijn. "Large deviations and dynamical phase transitions for quantum Markov processes." Thesis, University of Nottingham, 2014. http://eprints.nottingham.ac.uk/27741/.

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Quantum Markov processes are widely used models of the dynamics open quantum systems, a fundamental topic in theoretical and mathematical physics with important applications in experimental realisations of quantum systems such as ultracold atomic gases and new quantum information technologies such as quantum metrology and quantum control. In this thesis we present a mathematical framework which effectively characterises dynamical phase transitions in quantum Markov processes, using the theory of large deviations, by combining insights developed in non-equilibrium dynamics with techniques from
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4

Braun, Simon. "Negative absolute temperature and the dynamics of quantum phase transitions." Diss., Ludwig-Maximilians-Universität München, 2014. http://nbn-resolving.de/urn:nbn:de:bvb:19-180026.

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In dieser Promotionsarbeit präsentiere ich die erstmalige Realisierung eines Zustands negativer absoluter Temperatur für bewegliche Teilchen, sowie zusätzlich die detaillierte Untersuchung der Dynamik eines Quantenphasenübergangs. Als Grundlage für die Experimente dienten uns ultrakalte Atome in optischen Gittern, die durch den Bose-Hubbard Hamilton-Operator beschrieben werden können. Das Charakteristikum negativer Temperaturen ist eine invertierte Besetzungsverteilung, bei der Zustände hoher Energien stärker besetzt sind als niederenergetische Zustände. Daraus folgt die experimentelle Herau
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5

Heyl, Markus Philip Ludwig [Verfasser], and Stefan [Akademischer Betreuer] Kehrein. "Nonequilibrium phenomena in many-body quantum systems : dynamics, thermodynamics, and dynamical phase transitions / Markus Philip Ludwig Heyl. Betreuer: Stefan Kehrein." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2012. http://d-nb.info/1024658619/34.

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6

Braun, Simon [Verfasser], and Immanuel [Akademischer Betreuer] Bloch. "Negative absolute temperature and the dynamics of quantum phase transitions / Simon Braun. Betreuer: Immanuel Bloch." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2014. http://d-nb.info/1068767162/34.

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7

Meng, Tobias [Verfasser], Achim [Akademischer Betreuer] Rosch, Simon [Akademischer Betreuer] Trebst, and Jörg [Akademischer Betreuer] Schmalian. "Quantum Critical Matter : Quantum Phase Transitions with Multiple Dynamics and Weyl Superconductors / Tobias Meng. Gutachter: Achim Rosch ; Simon Trebst ; Jörg Schmalian." Köln : Universitäts- und Stadtbibliothek Köln, 2012. http://d-nb.info/1038234174/34.

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8

Lechtenberg, Benedikt [Verfasser], Frithjof [Akademischer Betreuer] Anders, and Joachim [Gutachter] Stolze. "Equilibrium and nonequilibrium dynamics close to impurity quantum phase transitions / Benedikt Lechtenberg. Betreuer: Frithjof Anders. Gutachter: Joachim Stolze." Dortmund : Universitätsbibliothek Dortmund, 2015. http://d-nb.info/1112270000/34.

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9

Cinnirella, Alessandro. "Dynamics of the Heisenberg XXZ model across the ferromagnetic transition." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amslaurea.unibo.it/9341/.

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In questa tesi viene presentata un'analisi numerica dell'evoluzione dinamica del modello di Heisenberg XXZ, la cui simulazione è stata effettuata utilizzando l'algoritmo che va sotto il nome di DMRG. La transizione di fase presa in esame è quella dalla fase paramagnetica alla ferromagnetica: essa viene simulata in una catena di 12 siti per vari tempi di quench. In questo modo si sono potuti esplorare diversi regimi di transizione, da quello istantaneo al quasi-adiabatico. Come osservabili sono stati scelti l'entropia di entanglement, la magnetizzazione di mezza catena e lo spettro dell'entangl
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10

Aulbach, Maximilian Wolfgang [Verfasser]. "Magnetic order and magnetic phase transitions in triangular or depleted periodic Anderson lattices: Studies within the framework of dynamical mean-field theory powered by hybridization expansion continuous-time quantum Monte Carlo / Maximilian Wolfgang Aulbach." Hamburg : Staats- und Universitätsbibliothek Hamburg Carl von Ossietzky, 2021. http://d-nb.info/1236695046/34.

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11

Vodola, Davide. "Correlations and quantum dynamics of 1D fermionic models : new results for the Kitaev chain with long-range pairing." Thesis, Strasbourg, 2015. http://www.theses.fr/2015STRAF007/document.

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La première partie de la thèse étudie le diagramme de phase d’une généralisation de la chaîne de Kitaev qui décrit un système fermionique avec un pairing p-wave à long rayon qui tombe avec la distance ℓ comme 1/ℓα. On a analysé les lignes critiques, les corrélations et le comportement de l’entropie d’entanglement avec la taille du système. Nous avons démontré l’existence de deux régimes massifs, (i) où les fonctions de corrélation tombent exponentiellement à de courtes distances et comme puissance à de longues distances (α > 1), (ii) où elles tombent à puissance seuleme
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12

Werner, Philipp. "Dissipative quantum phase transitions /." Zürich, 2005. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=16134.

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13

Orús, Lacort Román. "Entanglement, quantum phase transitions and quantum algorithms." Doctoral thesis, Universitat de Barcelona, 2006. http://hdl.handle.net/10803/482202.

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From the seminal ideas of Feynman and until now, quantum information and computation has been a rapidly evolving field. While at the beginning, physicists looked at quantum mechanics as a theoretical framework to describe the fundamental processes that take place in Nature, it was during the 80’s and 90’s that people began to think about the intrinsic quantum behavior of our world as a tool to eventually develop powerful information technologies. As Landauer pointed out, information is physical, so it should not look strange to try to bring together quantum mechanics and information theory. I
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14

Blythe, Richard Alexander. "Nonequilibrium phase transitions and dynamical scaling regimes." Thesis, University of Edinburgh, 2001. http://hdl.handle.net/1842/10834.

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In recent years, the application of statistical mechanics to nonequilibrium systems, and quite specifically the probabilistic modelling of nonequilibrium microscopic dynamics, has become a major research topic. However, in contrast to the equilibrium case, there is currently no general framework within which nonequilibrium systems are understood. Hence the aim of this thesis is to improve our understanding of nonequilibrium systems through the study of a range of systems with probabilistic microscopic dynamics and the collective phenomena - notably phase transitions and the onset of scaling re
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15

Rowley, Stephen Edward. "Quantum phase transitions in ferroelectrics." Thesis, University of Cambridge, 2011. https://www.repository.cam.ac.uk/handle/1810/252224.

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16

Benzid, Khalif. "Etude de l'effet de l'anisotropie magnétique sur la phase dynamique et sur la phase géométrique des bits quantiques de spins électroniques d'ions de métaux de transition Mn2+, Co2+, Fe3+ isolés et des complexes d'ions Fe3+ dans l'oxyde de zinc monocristallin." Thesis, Strasbourg, 2016. http://www.theses.fr/2016STRAE009/document.

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Nous avons étudié, par RPE impulsionnelle, la cohérence quantique et des spins électroniques des ions de transition Mn2+, Co2+, Fe3+, et des complexes Fe3+/Cs+ et Fe3+/Na+, tous présents dans le ZnO monocristallin. Nous avons trouvé que l’anisotropie magnétique peut altérer la cohérence de la phase dynamique des qubits des spins électroniques. Nous avons mesuré une faible décohérence pour les spins d’ions Mn2+et Fe3+ dans ZnO, qui ont tous deux une faible anisotropie magnétique uniaxiale, tandis que les ions Co2+ isolés avec une très forte anisotropie magnétique uniaxiale, une décohérence rapi
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17

Hook, Daniel William. "Phase transitions in quantum microcanonical equilibrium." Thesis, Imperial College London, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.497906.

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18

Collura, Mario. "Aspects hors de l'équilibre de systèmes quantiques unidimensionnels fortement corrélés." Thesis, Université de Lorraine, 2012. http://www.theses.fr/2012LORR0009/document.

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Dans cette thèse, nous avons répondu à certaines questions ouverts dans le domaine de la dynamique hors équilibre des systèmes quantiques unidimensionnels fermés. Durant ces dernières années, les avancées dans les techniques expérimentales ont revitalisé la recherche théorique en physique de la matière condensée et dans l'optique quantique. Nous avons traité trois sujets différents et en utilisant des techniques à la fois numériques et analytiques. Dans le cadre des techniques numériques, nous avons utilisé des méthodes de diagonalisation exacte, l'algorithme du groupe de renormalisation de la
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19

Stow, Simon John. "Phase transitions in relativistic systems." Thesis, Royal Holloway, University of London, 1985. http://repository.royalholloway.ac.uk/items/e6332754-d6f0-4d29-8960-dc05a5ca3390/1/.

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The BCS free energy for <sup>3</sup>P<sub>2</sub> paired neutron matter is derived taking account of relativistic effects. It is found that the values taken by the Ginzburg-Landau parameters are always in the region of the phase diagram correponding to a unitary phase. Phase transitions in the early universe are also discussed with inclusion of the effects of Higgs scalar chemical potentials as well as fermionic chemical potentials. The conditions for equilibrium, and the critical density to prevent symmetry restoration at high temperatures are studied. It is observed that the decay of pre-exi
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20

Sang, Yan. "Phases and Phase Transitions in Quantum Ferromagnets." Thesis, University of Oregon, 2015. http://hdl.handle.net/1794/18716.

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In this dissertation we study the phases and phase transition properties of quantum ferromagnets and related magnetic materials. We first investigate the effects of an external magnetic field on the Goldstone mode of a helical magnet, such as MnSi. The field introduces a qualitatively new term into the dispersion relation of the Goldstone mode, which in turn changes the temperature dependences of the contributions of the Goldstone mode to thermodynamic and transport properties. We then study how the phase transition properties of quantum ferromagnets evolve with increasing quenched disorder
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21

Kobayashi, Kohjiro. "Topics in classical and quantum phase transitions." Columbus, Ohio : Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1199254396.

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22

Duncan, William. "Quantum phase transitions in NbFe2 and BaFe2As2." Thesis, Royal Holloway, University of London, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.538298.

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23

Mukhopadhyay, Ranjan Goodstein David L. "Quantum phase transitions in disordered Bose systems /." Diss., Pasadena, Calif. : California Institute of Technology, 1998. http://resolver.caltech.edu/CaltechETD:etd-02022007-104407.

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24

Gillman, Edward. "Topological defect formation in quantum phase transitions." Thesis, Imperial College London, 2018. http://hdl.handle.net/10044/1/62633.

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The Kibble Zurek mechanism describes the universal formation of topological defects during continuous symmetry breaking phase transitions. It has been confirmed in a wide variety of systems and is of interest within theoretical high energy physics and cosmology. While during high temperature phase transitions classical methods can be used to study topological defect formation, in zero temperature quantum phase transitions, quantum effects can dominate dynamics such that classical approximations fail. This is problematic in quantum field theory because topological defect formation constitutes a
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25

Sperstad, Iver Bakken. "Dissipative quantum phase transitions and high-temperature superconductors." Doctoral thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for fysikk, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-17523.

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This thesis presents seven research papers on topics in condensed-matter theory. Five of the papers report on Monte Carlo studies of quantum phase transitions in various (d+1)-dimensional statistical mechanics models featuring Caldeira-Leggettlike dissipation. The principal motivation for these studies was to investigate a particular bond-dissipative (2+1)-dimensional XY model of circulating currents in cuprate high-temperature superconductors. It has been proposed that quantum critical fluctuations associated with a local quantum critical point described by this model can explain the marginal
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26

Goswami, Pallab. "Quantum phase transitions in dissipative and disordered systems." Diss., Restricted to subscribing institutions, 2008. http://proquest.umi.com/pqdweb?did=1680035131&sid=4&Fmt=2&clientId=1564&RQT=309&VName=PQD.

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27

Lee, Junhyun. "Novel Quantum Phase Transitions in Low-Dimensional Systems." Thesis, Harvard University, 2016. http://nrs.harvard.edu/urn-3:HUL.InstRepos:33493318.

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We study a number of quantum phase transitions, which are exotic in their nature and separates non-trivial phases of matter. Since quantum fluctuations, which drive these phase transitions, are stronger in low-dimensions, we concentrate on low-dimensional systems. We consider two different two-dimensional systems in this thesis and study their phase transition. First, we investigate a phase transition in graphene, one of the most famous two-dimensional systems in condensed matter. For a suspended bilayer graphene in ν = 0 quantum Hall regime, the conductivity data and mean-field analysis sug
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28

McKenzie, Ryan. "Fluctuations and phase transitions in quantum Ising systems." Thesis, University of British Columbia, 2016. http://hdl.handle.net/2429/59105.

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The quantum Ising model is perhaps the simplest possible model of a quantum magnetic material. Despite its simplicity, its versatility and wide range of applications, from quantum computation, to combinatorial optimization, to biophysics, make it one of the most important models of modern physics. In this thesis, we develop a general framework for studying quantum Ising systems with an arbitrary single ion Hamiltonian, with emphasis on the effects of quantum fluctuations, and the quantum phase transition between paramagnetic and ferromagnetic states that occurs when a magnetic field is applied
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29

Lees, Benjamin T. "Quantum spin systems, probabilistic representations and phase transitions." Thesis, University of Warwick, 2016. http://wrap.warwick.ac.uk/82123/.

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This thesis investigates properties of classical and quantum spin systems on lattices. These models have been widely studied due to their relevance to condensed matter physics. We identify the ground states of an antiferromagnetic RP2 model, these ground states are very di�erent from the ferromagnetic model and there was some disagreement over their structure, we settle this disagreement. Correlation inequalities are proved for the spin- 1/2 XY model and the ground state of the spin-1 XY model. This provides fresh results in a topic that had been stagnant and allows the proof of some new resul
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30

Al-Sawai, Wael. "Non-equilibrium Phase Transitions in Interacting Diffusions." Scholar Commons, 2018. https://scholarcommons.usf.edu/etd/7660.

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The theory of thermodynamic phase transitions has played a central role both in theoretical physics and in dynamical systems for several decades. One of its fundamental results is the classification of various physical models into equivalence classes with respect to the scaling behavior of solutions near the critical manifold. From that point of view, systems characterized by the same set of critical exponents are equivalent, regardless of how different the original physical models might be. For non-equilibrium phase transitions, the current theoretical framework is much less developed. In par
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31

Restrepo, Lopez Ricardo. "Topics in spatial and dynamical phase transitions of interacting particle systems." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/42729.

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In this work we provide several improvements in the study of phase transitions of interacting particle systems: - We determine a quantitative relation between non-extremality of the limiting Gibbs measure of a tree-based spin system, and the temporal mixing of the Glauber Dynamics over its finite projections. We define the concept of 'sensitivity' of a reconstruction scheme to establish such a relation. In particular, we focus on the independent sets model, determining a phase transition for the mixing time of the Glauber dynamics at the same location of the extremality threshold of the simpl
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32

Yuste, Roca Abel Vicenç. "A theoretical study on some exotic quantum phase transitions." Doctoral thesis, Universitat Autònoma de Barcelona, 2018. http://hdl.handle.net/10803/665539.

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El meu doctorat està dedicat a analitzar transicions de fases quàntiques de naturalesa exòtica en sistemes fortament correlacionats descrits per Hamiltonians de spin. D’una banda, m’he centrat en l’estudi de transicions de fase quàntiques localitzades a prop de punts multicr ı́tics. Aquests punts són particularment patològics ja que diverses fases quàntiques coexisteixen en una petita regió de paràmetres del Hamiltonià. Aquest fet, tal i com argumentaré al llarg de la tesis, condiciona palesament les propietats mostrades pel sistema fortament correlacionat. De l’altre, també he investig
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33

Renberg, Rasmus. "Superconductor-Insulator Quantum Phase Transitions in a Dissipative Environment." Thesis, KTH, Fysik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-239615.

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34

Winder, Daniel. "Investigating phase transitions using the linear delta expansion." Thesis, Imperial College London, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.246678.

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35

Diener, Jacobus Petrus Willem. "Ferromagnetic phase transitions in neutron stars." Thesis, Stellenbosch : Stellenbosch University, 2012. http://hdl.handle.net/10019.1/71982.

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Thesis (PhD)--Stellenbosch University, 2012.<br>ENGLISH ABSTRACT: We consider the ferromagnetic phase in pure neutron matter as well as charge neutral, betaequilibrated nuclear matter. We employ Quantum Hadrodynamics, a relativistic field theory description of nuclear matter with meson degrees of freedom, and include couplings between the baryon (proton and neutron) magnetic dipole moment as well as between their charge and the magnetic field in the Lagrangian density describing such a system. We vary the strength of the baryon magnetic dipole moment till a non-zero value of the magnetic
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36

Osychenko, Oleg N. "Monte Carlo study of quantum phase transitions at zero temperature." Doctoral thesis, Universitat Politècnica de Catalunya, 2012. http://hdl.handle.net/10803/123715.

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The Thesis is devoted to simulations of quantum phase transitions by means of Quantum Monte Carlo techniques. Quantum phase transition is a transition between phases at zero or low enough temperature, where quantum effects play an important role. The recent advances in the field of ultracold atom manipulation and optical lattices allowed to produce the systems with unique properties. This opened a perspective to observe quantum phase transitions in many-body systems with non-trivial interparticle interactions in a wide range of the system's characteristic physical parameters and geometries.
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37

Höppel, Lutz W. "Phase transitions in single layer and bilayer quantum Hall ferromagnets." [S.l. : s.n.], 2004. http://www.bsz-bw.de/cgi-bin/xvms.cgi?SWB11380453.

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38

Bradlyn, Barry J. "Effective action approach to quantum phase transitions in bosonic lattices." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/51601.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, 2009.<br>Includes bibliographical references (p. 51-54).<br>In this thesis, I develop a new, field-theoretic method for describing the quantum phase transition between Mott insulating and superfluid states observed in bosonic optical lattices. I begin by adding to the Hamiltonian of interest a symmetry breaking source term. Using time-dependent perturbation theory, I then expand the grand-canonical free energy as a double power series in both the tunneling and the source term. From here, an order parameter field is introdu
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39

Bonart, Julius. "Phase transitions and diffusion in dissipative classical and quantum systems." Paris 6, 2013. http://www.theses.fr/2013PA066591.

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Cette thèse est structurée autour de trois chapitres principaux. Dans le premier chapitre, je présente de nouveaux résultats obtenus pour la théorie S\phi^4S hors équilibre, dont la dynamique est décrite par une equation de Langevin en présence d'un bruit coloré. Les corrélations temporelles du bruit décroissent avec une loi de puissance déterminée par un certain exposant que j'appelerai SalphaS. Il s'avère qu'il y a un S\alpha_cS de transition qui dépend de la dimension SDS du système et qui sépare le plan S(\alpha, D)S en une région où la couleur du bruit modifie le comportement critique et
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40

Radha, Santosh Kumar. "Knitting quantum knots-Topological phase transitions in Two-Dimensional systems." Case Western Reserve University School of Graduate Studies / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=case1595870012750826.

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41

Pandey, Toplal. "QUANTUM PHASE TRANSITIONS AND TOPOLOGICAL ORDERS IN SPIN CHAINS AND LADDERS." Thesis, Laurentian University of Sudbury, 2014. https://zone.biblio.laurentian.ca/dspace/handle/10219/2142.

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Dimerized antiferromagnetic spin-1/2 chains and ladders demonstrate quantum critical phase transition, the existence or absence of which is dependent on the dimerization and the dimerization pattern of the chain and the ladder, respectively. The gapped phases can not be distinguished by the conventional Landau long-range order parameters. However, they possess non-local topological string order parameters which can be used to classify different phases. We utilize the self-consistent free fermionic approximation and some standard results for exactly solved models to analytically calculate the s
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42

Moore, Joel Ellis 1973. "Phase transitions and symmetry breaking in disordered quantum Hall edge states." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/8281.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 2001.<br>Includes bibliographical references (p. 94-96).<br>Tunneling into the edge of a quantum Hall droplet is a sensitive probe of the topological orders believed to exist in fractional quantum Hall states. The tunneling behavior of a general hierarchy state is studied within the chiral-Luttinger-liquid model of low-energy edge dynamics. Adding random hopping of quasiparticles between edge modes results in "symmetry restoration by disorder" and universal weak tunneling behavior in edges with modes traveling in both di
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43

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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44

Ronquillo, David Carlos. "Magnetic-Field-Driven Quantum Phase Transitions of the Kitaev Honeycomb Model." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1587035230123328.

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45

Kimene, Kaya Boniface Dimitri Christel. "Crossovers and phase transitions in Bose-Fermi mixtures." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/86471.

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Thesis (MSc)--Stellenbosch University, 2014.<br>ENGLISH ABSTRACT: We present a theoretical approach that allows for the description of trapped Bose-Fermi mixtures with a tunable interspecies interaction in the vicinity of a Feshbach resonance magnetic field.The many-body physics of the system is treated at equilibrium using the well-established mean-field and local density approximations. This reduces the physics locally to that of a homogeneous system. We observe a rich local phase structure exhibiting both first and second order phase transitions between the normal and BEC phases. We al
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46

Waheed, Qaiser. "Molecular Dynamic Simulations of Biological Membranes." Doctoral thesis, KTH, Teoretisk biologisk fysik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-102268.

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Biological membranes mainly constituent lipid molecules along with some proteins and steroles. The properties of the pure lipid bilayers as well as in the presence of other constituents (in case of two or three component systems) are very important to be studied carefully to model these systems and compare them with the realistic systems. Molecular dynamic simulations provide a good opportunity to model such systems and to study them at microscopic level where experiments fail to do. In this thesis we study the structural and dynamic properties of the pure phospholipid bilayers and the phase b
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47

Iskin, Menderes. "BCS to BEC Evolution and Quantum Phase Transitions in Superfluid Fermi Gases." Diss., Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/16326.

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This thesis focuses on the analysis of Bardeen-Cooper-Schrieffer (BCS) to Bose-Einstein condensation (BEC) evolution in ultracold superfluid Fermi gases when the interaction between atoms is varied. The tuning of attractive interactions permits the ground state of the system to evolve from a weak fermion attraction BCS limit of loosely bound and largely overlapping Cooper pairs to a strong fermion attraction limit of tightly bound small bosonic molecules which undergo BEC. This evolution is accompanied by anomalous behavior of many superfluid properties, and reveals several quantum phas
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48

Bonnes, Lars [Verfasser], and Stefan [Akademischer Betreuer] Weßel. "Quantum phase transitions in constrained Bose systems / Lars Bonnes. Betreuer: Stefan Weßel." Stuttgart : Universitätsbibliothek der Universität Stuttgart, 2011. http://d-nb.info/1014785243/34.

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Nejati, Ammar [Verfasser]. "Quantum Phase Transitions in Multi-Impurity and Lattice Kondo Systems / Ammar Nejati." Bonn : Universitäts- und Landesbibliothek Bonn, 2017. http://d-nb.info/1132711398/34.

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Sandoildo, Freitas Tenório Antônio. "Phase transitions and thermodynamics of quasione- dimensional quantum rotor and spin systems." Universidade Federal de Pernambuco, 2009. https://repositorio.ufpe.br/handle/123456789/6664.

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Made available in DSpace on 2014-06-12T18:06:41Z (GMT). No. of bitstreams: 2 arquivo945_1.pdf: 1972275 bytes, checksum: faf69ec63b01c315fa88949dbaf22651 (MD5) license.txt: 1748 bytes, checksum: 8a4605be74aa9ea9d79846c1fba20a33 (MD5) Previous issue date: 2009<br>Sandoildo Freitas Tenório, Antônio; Domingues Coutinho Filho, Maurício. Phase transitions and thermodynamics of quasione- dimensional quantum rotor and spin systems. 2009. Tese (Doutorado). Programa de Pós-Graduação em Física, Universidade Federal de Pernambuco, Recife, 2009.
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