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Showing 1 to 13 of 13 for “"Condensed matter theory"”.
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Ground states of a two-dimensional frustrated quantum antiferromagent Cs₂CuCl₄
… antiferromagnet are interesting topics in condensed matter theory. Among the quantum antiferromagnets, Cs₂CuCl₄ gains attention as one of the candidates for materials with ground state spin liquid phase. The recent experimental results show that there exist several ground state phases in …
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Magnetic super-exchange with ultra cold atoms in spin dependent optical lattices
… a very useful testing ground for novel states of matter, testing fundamental condensed matter theory, and may help illuminate a possible connection between the mechanism behind high temperature superconductivity and quantum magnetism. This thesis will focus on trapping cold bosonic atoms in spin …
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Coulomb Correlations in Equilibrium and Nonequilibrium Many -Fermion Systems
The importance of the field of Condensed Matter Physics can hardly be overstated. It deals with matter at everyday energies and with length and times scales in which complex processes are able to occur. It is a field in which much experimental and theoretical effort has been invested. New …
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Coulomb correlations in equilibrium and nonequilibrium many-Fermion systems
The importance of the field of Condensed Matter Physics can hardly be overstated. It deals with matter at everyday energies and with length and times scales in which complex processes are able to occur. It is a field in which much experimental and theoretical effort has been invested. New …
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Electronic excitations in branched conjugated oligomers: A quasiparticle view and tight-binding models
… (lattice) model, originally developed in condensed matter theory, has been extended to the building block structure of conjugated molecules for explicit description of the electronic excitations.</p> <p>Within the ES approach, the electronic excitations in quasi-1D molecular structures are …
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Aspects of symmetry, topology and anomalies in quantum matter
… phenomena is one of the stimuli driving the condensed matter community forward. Importantly, the new insights and solutions for condensed matter theory sometimes come from the developed and developing knowledge of high energy theory, mathematical and particle physics, which is also true the …
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Theory of the electronic and optical properties of dilute bismide alloys
… unique properties. In this thesis we develop the theory of the electronic and optical properties of dilute bismide alloys. By adopting a multi-scale approach encompassing atomistic calculations of the electronic structure using the semi-empirical tight-binding method, as well as continuum …
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Topics in the Theory of Condensed Matter: Electron Field Emission, Field Ionization, and Ethane Catalysis
Submitted by Jesse Garrison (jagarris@illinois.edu) on 2012-01-11T19:04:18Z No. of bitstreams: 1 1974_fauchier.pdf: 4688942 bytes, checksum: 02db929e93e9eb7d5d635803a11519c6 (MD5)
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Fundamental Excitations of Nonconservative Quantum Fluids
… their theoretical treatment. The dynamical theory of these nonconservative condensates is an emerging field which resides at the intersection of the theories of nonequilibrium pattern formation, nonlinear wave dynamics and condensed matter theory. In this thesis I describe several …
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Studies on the effect of noise in boundary quantum phase transitions
<p>Boundary quantum phase transitions are abrupt ground state transitions triggered by the change of the boundary conditions at single or multiple (but finite) points.</p><p>When boundary effects dominate, understanding boundary quantum phase transitions requires a deeper knowledge of strongly …
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Spectral and dynamical properties of disordered and noisy quantum spin models
… proceeding by analogy to the single-particle theory of weak localisation. Whilst we are able to describe diffusion, the analogy breaks down and a description of the onset of localisation in terms of quantum corrections quickly becomes intractable. Some progress is possible by deriving a …
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Topics in gauge/gravity duality
… years, the Anti-de Sitter (AdS)/Conformal Field Theory (CFT) correspondence and its generalization in the ideas of gauge/gravity duality have had a profound impact in our understanding of strongly interacting quantum field theories. Roughly speaking, the correspondence maps the degrees of freedom …
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Quantum simulation and out-of-equilibrium dynamics of quantum gases in optical cavities
… a two-component Dicke model with complex light-matter couplings, accounting for photon losses. We compute the steady-state phase diagram and find dynamical in- stabilities in the form of limit cycles, heralded by the presence of exceptional points and level attraction. We show that the …