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 66 for “"Phases Of Matter"”.
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Topological phases of matter
Topological phases are gapped quantum phases of matter classified beyond the paradigm of Landau's symmetry breaking theory. In particular, topologically ordered phases are topological phases with topological order. Unlike the conventional symmetry-breaking order described by local order parameter, …
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Quantum Transport in Topological Phases of Matter
Topological phases of matter attract constant attention in the condensed matter physics community, both due to the fundamental yet simple principles that govern them, and a multitude of experimental observations with the potential for technological applications. Among the ways of studying such …
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Geometry-charge responses in topological phases of matter
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-03-01 without embargo terms
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Subdimensional particles and higher rank quantum phases of matter
Many quantum phases of matter, such as quantum spin liquids and fractional quantum hall systems, are well-described in the language of gauge theory. Until recently, most theoretical attention has been focused on systems described by familiar vector gauge theories. In this thesis, we will explore …
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Applications of conformal field theories in topological phases of matter
This dissertation discusses some applications of conformal field theories (CFTs) in topological phases of matter. The first part is devoted to a discussion of coupled wire constructions of some novel quantum Hall systems. Through a theoretical coupled wire model, we construct strongly correlated …
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Geometric and electromagnetic response and anomalies in topological phases of matter
… this thesis we characterize various topological phases of matter by studying their response to external perturbations. In the first half of the thesis we study incompressible fluid phases with odd, or Hall, viscosity. This kind of viscosity was originally discovered in quantum Hall fluids, where …
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Intertwined symmetry and topology in 3 + 1 dimensional gapped quantum phases of matter
This thesis is an investigation of various topological properties of 3 + 1 dimensional Bosonic gapped phases of matter. We divide our study into two main themes, the first involving short-range entangled phases with global symmetries also known as symmetry protected topological phases and the …
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Aspects of critical spin 1 chains and 2 dimensional symmetry protected topological phases of matter
… We use this approach to study a certain class of critical quantum spin-1 chains and symmetry protected topological phases of matter in two spatial dimensions. In the first context we consider the SU(3) symmetric spin-1 chain with additional interactions. We use bosonization to demonstrate that …
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The Kitaev Model on Surfaces with Lattice Defects and of Higher Genus
The quantum phase of a physical system is defined as its ground state. As examples of quantum phases we mention super uids, superconductors, Bose- Einstein condensates and quantum Hall states. Different phases of a system originate from the different ways a systems' constituents can be organised …
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Studies of Topology and Order in Frustrated Spin Systems
The main focus of this dissertation is the interplay between topology and order in frustrated quantum spin systems. We identify the relevant effects in the study of novel phases of matter, as they emerge in tractable quantum spin models, and we make several original contributions. In this …
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Explorations in two dimensional strongly correlated quantum matter: from exactly solvable models to conformal bootstrap
… presents two projects that touch upon the role of quantum mechanics in classifying phases of matter and their transitions. In the first project, we set out to answer: is it possible to find a lattice model in the Ising universality class that realizes the Kramers Wannier symmetry in such a way …
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Determing the Properties of Dense Matter: Superconductivity, Bulk Viscosity, and Light Reflection in Compact Stars
… this dissertation, we investigate the properties of matter, denser than nuclei, that exists inside compact stars. First, we examine a mixed superfluid/superconductor system, which likely occurs in neutron star cores. We derive an effective theory of Cooper pair quasiparticles from a microscopic …
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Strongly Correlated Electronic Matter: Phases and their Transport
… surveys the research in strongly correlated matter that I have done over the course of my PhD. It can broadly be divided into two categories: phases of matter and their transport. My research into phases of matter has been concerned with the low energy properties of interacting electrons at …
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Chiral Phases on the Lattice
… field theories (QFTs) describe a wide range of physical systems, from the standard model to topological quantum matter, the realization of chiral QFTs on a lattice has proved to be difficult due to the Nielsen-Ninomiya theorem and the possible presence of quantum anomalies. In this thesis, we …
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QUANTUM SIMULATION OF BOSONIC SYSTEM AND APPLICATION OF MACHINE LEARNING
First, we introduce the notion of "generalized bosons," whose exchange statistics resemble those of bosons, but the local bosonic commutator $[a_i,a_i^{\dagger}]=1$ is replaced by an arbitrary single-mode operator that is diagonal in the generalized Fock basis. Examples of generalized bosons …
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Probing and preparing novel states of quantum degenerate rubidium atoms in optical lattices
… to realize and study novel quantum mechanical phases of matter with the control and precision offered by atomic physics. Towards this goal, as important as engineering new states of matter is the need to develop new techniques to probe these systems. I first describe our work on realizing Bragg …
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Topological materials and quantum entanglement
As the title implies, this thesis consists of two main topics: materials which realize topological phases of matter and applications of the concept of entanglement in understanding topological phases and their transitions. The first part will focus on a particular class of materials called …
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Engineering Topological Quantum Matter with Patterned Light
Topological phases are intriguing phases of matter which cannot be described with traditional characterization methods, and numerous efforts has been put to achieve these exotic phases of matter in a variety of quantum platforms. In this thesis, we discuss how topological quantum states of matter …
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Ultrafast Probing of Nonlinear Dynamics in Quantum Materials: Beyond Linear Response Probes
… between the spin, orbital, and charge degrees of freedom of electrons give rise to a variety of exotic phenomena and emergent phases of matter in quantum materials. However, understanding these phenomena is often hindered by the lack of experimental probes that are sensitive to multiple degrees …
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Light-induced States and Phase Transitions in Quantum Materials investigated by Photoemission Spectroscopy and Epitaxial Synthesis
In condensed matter physics, a field of the study on phases of matter and their transitions, light-induced states and phase transitions have attracted significant attention due to their importance in both fundamental research and applications. This thesis will specifically delve into three …
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