Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 64 for “"Many-body Physics"”.
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Topics in many-body physics
"This thesis is divided into two parts. The first describes a study of the dilute Fermi gas with short range repulsive interactions in 2D, with special emphasis on questions related to the validity of Fermi liquid theory. We find that despite the existence of non-perturbative effects due to …
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Case Studies in Many-Body Physics
<p>The many-body problem refers to any physical problem made of more than two interacting particles. With increasing number of particles in a system, their coupling and entanglement becomes more complex, and there is no general analytic solution even for a three-body classical or quantum systems. …
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Multipole Symmetries and Many Body Physics
This thesis studies the many body physics of systems with multipolar conservation laws --- systems which conserve both a total charge and various multipole moments thereof. These conservation laws place constraints on the way in which particles can move, and carry important ramifications for both …
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Inverse methods in quantum many-body physics
"The interactions of many quantum particles can give rise to fascinating emergent behavior and exotic phases of matter with no classical analogues. Examples include phases with topological properties, which can occur at low temperatures in frustrated magnets and certain superconductors, and …
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Quantum Stochastic Processes and Quantum Many-Body Physics
… processes and its applications in quantum many-body physics. The main goal is to analyse complexity-theoretic aspects of both static and dynamic properties of physical systems modelled by quantum stochastic processes. The thesis consists of two parts: the first one addresses the …
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Studying many-body physics through quantum coding theory
… techniques to study physical properties of many-body spin systems. This thesis illustrates the use of classical and quantum coding theory in classifying quantum phases arising in many-body spin systems via a systematic study of stabilizer Hamiltonians with translation symmetries. In the …
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Quantum many-body physics with classical and quantum algorithms
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2023-12-01
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Quantum many body physics in single and bilayer graphene
… a uniquely promising avenue for investigation of many body physics. Graphene constitutes a new and unusual 2DES, which may give rise to unexpected collective phenomena. However, the vanishing density of states in charge neutral single layer graphene suppresses many body effects, and one has to …
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Few- and Many-body Physics with Strongly Interacting Bose Gases
… describes experiments that explore few- and many-body physics in strongly interacting Bose gases. Our experimental platform uses Bose-Einstein condensates and cold thermal gases of 39K in different hyperfine states or their combinations, trapped in a quasi-uniform optical potential. We focus …
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Topics in quantum information theory and quantum many-body physics
… between quantum information theory and quantum many-body physics. The first pertains to quantum algorithms, where few computational problems are believed to exhibit exponential separation between quantum and classical performance. For those that are, natural generalizations remain elusive. One …
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Many-body physics and non-equilibrium dynamics in ultracold atomic systems
… techniques in order to elucidate aspects of many-body physics and non-equilibrium dynamics. In the first two studies I model the dynamics of nonlinear solitonic excitations in ultracold fermionic superfluids: the first simulates recent experiments and supports the hypothesis that the solitons …
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Quantum Resources in Quantum Technologies: From Quantum Optimization to Many-Body Physics
… quantum optimization algorithms to quantum many-body systems. First, we show how squeezing establishes a natural connection between the Quantum Approximate Optimization Algorithm and quantum metrology, revealing the role of quantum correlations and providing a benchmarking method for …
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Excitons in Two-Dimensional Materials: from Many-Body Physics to Quantum Technologies
… platforms of study for both technology and physics applications. Their optical signatures include the photoluminescence emission from the recombination of bound electron-hole pairs, or excitons. Their unique band structure gives rise to rich excitonic spectra where the excitons possess large …
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Quantum many-body physics of ultracold molecules in optical lattices: models and simulation methods
Includes bibliographical references.
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Few- and many-body physics of dipoles in ion traps and optical lattice simulators
The presence of strong interactions in quantum many-body systems makes the analytical treatment of such systems very difficult. In this thesis we explore two possible proposals for simulating strongly correlated, quantum many-body systems: quantum simulations using trapped-ion quantum computers, …
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TOWARDS ULTRACOLD FERMIONS IN 2D DISORDERED OPTICAL LATTICES
… offers unparalleled control for studying complex many body phenomena, yet scalable platforms for disordered systems remain challenging. This work presents the development of an experimental platform to investigate quantum many-body physics with ultracold lithium-6 fermions in a two dimensional …
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Quantum nonlinear optics: controlling few-photon interactions
… The work in this thesis explores this regime of physics. This paves the path to exploring strongly interacting many-body physics with photons which is still a largely unexplored domain. The ability to control strongly interacting photons is also of central importance in quantum science and …
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Optical and Spin Properties of Defect-Bound Excitons in Semiconductors
… faults could potentially be useful for studying many-body physics in strongly-interacting exciton gases.
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Many-Body Effects in the Thermodynamic Properties of Fermi Liquids and the Electron-Phonon System and in the Excitation Spectrum of Liquid Helium-4
In this thesis I study two separate topics in many-body physics. In the first part I consider many-body effects in the thermodynamic properties of Fermi liquids and of the electron-phonon system. Using normal liquid ('3)He as an example, I show that the T('3)lnT corrections due to spin fluctuations …
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The structure of many-body entanglement
… structure of quantum entanglement in local many-body systems. A central theme is the organizing power of the renormalization group for thinking about many-body entanglement. We argue that the coarse structure of entanglement across of wide variety of systems, from gapped topological phases …
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