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 14 of 14 for “"many-body localization"”.
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Numerical studies on many-body localization
… in our understanding of physical processes. Many-body localization (MBL) is a phase of matter in which thermalization does not apply and ergodicity is broken. This striking behavior, which can appears on closed, interacting, quantum systems subject to strong disorder, has been the focus of a …
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Many-body localization and tensor networks
This thesis is focused on many-body localization (MBL) and the development of algorithms using the tensor networks representation for many-body localized systems. Chapter 1 is a detailed discussion on the MBL phenomenon. Chapter 2 gives an introduction to the numerical techniques that are …
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Artificial Neural Networks as a Probe of Many-Body Localization in Novel Topologies
… may be used as a tool for universal probing of many-body localization in quantum graphs. We produce an artificial neural network, training it on the entanglement spectra of the nearest-neighbour Heisenberg spin1/2 chain in the presence of extremal (definitely ergodic/localizing) disorder values …
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Transport and disorder-induced localization of ultracold Fermi gases
We experimentally study localization and dynamics of ultracold fermions in speckle and optical lattice potentials to explore Anderson localization, many-body localization, and relaxation dynamics in strongly correlated systems. Anderson localization is probed by releasing non-interacting, …
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Topology, localization, and spontaneous symmetry breaking in nonequilibrium many-body systems
Exotic many-body phenomena are usually associated with the ground state of a time-independent Hamiltonian. It is natural to ask whether these physics can survive in a dynamic setting. Under a generic drive, the steady equilibrium state is most likely an infinite-temperature featureless thermal …
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Characterizing quantum morphology through topological data analysis
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2025-05-01
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Delocalization phenomena in strongly disordered systems
In this dissertation, we study delocalization mechanisms in strongly disordered systems. We focus on one-dimensional systems where the localizing effects of disorder are strongest. Our explorations of delocalization mechanisms will reveal new insights into the nature of Anderson transitions in the …
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Quantum Dynamics of Strongly-Interacting Bosons in Optical Lattices with Disorder
… 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 …
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Disorder-Free Localization
The venerable phenomena of Anderson localization, along with the more recent many-body localization (MBL), both depend crucially on the presence of disorder. Here we introduce a family of simple translationally invariant models of fermions locally coupled to spins, which have a disorder-free …
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Discrete time crystals beyond the MBL paradigm
… Indeed, according to the celebrated mechanism of many-body localization (MBL), disorder can avert the otherwise generally expected 'heat death' to a featureless infinite temperature state in a driven system. And yet, it has recently been discovered that alternative mechanisms do exist through …
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The Many Phases of the Surface Code: Coherent Errors and Many-Body Localisation
… of excited states, and we probe topological many body localization (MBL) which protects topological order for all eigenstates. In the first strand, we develop an interpretation of the error correction threshold for coherent error rotations as a phase transition. For this, we first generalize …
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Scaling of entanglement entropy in some condensed matter systems
… spin systems on ladders. Chapter 3 studies the many-body localization phase transition in a Rokhsar-Kivelson type wave function. Chapter 4 studies the subleading correction term of entanglement entropy in 2+1 dimensional scale invariant systems. Chapter 5 studies the bulk-boundary correspondence …
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Spectroscopy of Topological Materials and their Technological Applications
… we probe a nonequilibrium state of matter termed many-body localization by demonstrating a departure from thermalization of phonons in disordered semiconductor superlattices. The second part of the dissertation focuses on technological applications of topological materials following their …
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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 …