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 48 for “"strongly correlated systems"”.
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Holography and strongly correlated systems
… or holography - to problems associated with strongly coupled quantum field theories under extreme conditions such as finite temperature or density. We first study a strongly coupled field theory at finite temperature. We demonstrate that its low frequency limit is determined by the horizon …
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SPIN-ORBIT COUPLING IN STRONGLY CORRELATED SYSTEMS
… it is proposed that spin-orbit coupling can be strongly enhanced by Coulomb interaction in 5f metals. Modest values of the Coulomb interaction can induce up to a four-fold enhancement. In the third case, a model is presented to characterize spin-orbit enhancement in a strongly correlated …
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Exact Diagonalization Studies of Strongly Correlated Systems
… we use exact diagonalization to study a few strongly correlated systems, ranging from the Fermi-Hubbard model to the fractional quantum Hall effect (FQHE). The discussion starts with an overview of strongly correlated systems and what is meant by strongly correlated. Then, we extend cluster …
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The Gutzwiller variational method for strongly correlated systems
… the applications of the method to two specific correlated electron systems of current interest: (i) the spinless fermion model with non-local Coulomb interaction in one dimension and (ii) the pressure-induced insulator-metal transition in the colossal magneto-resistive compound LaMnO3. Our …
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Strongly Correlated Systems Approach Through Quantum Monte Carlo
Finally, we explore three algorithms for speeding up the calculation of determinant ratios specifically for insulators. These algorithms take advantage both of the locality of physics and the sparsity of the matrices that are used in the quantum wave functions that represent these insulators.
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Duality and strongly correlated systems in two dimensions
… observed in condensed matter physics involve strongly correlated systems near quantum critical points in two spatial dimensions. Examples range from the sharing of critical exponents (superuniversality) among quantum Hall plateau transitions to the emergence of a charge-vortex symmetry near …
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Electronic conduction and noise in strongly correlated systems
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1996.
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Two-particle level diagrammatic approaches for strongly correlated systems
… of new numerical methods for the treatment of strongly correlated electron systems based on self-consistent approaches at both the one and the two-particle level such as the parquet formalism. The parquet formalism was solved for the first time on a two-dimensional cluster. When the fully …
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Aspects of transport in strongly correlated systems with gravity duals
… the gauge/gravity duality to study transport in strongly coupled systems. The main content is organized in three parts. In the first part we investigate the interrelation between dimensionality and strength of interactions. It is known that the dynamics of systems in Condensed Matter and General …
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Efficient Fock Space Configuration Interaction Approaches For Large Strongly Correlated Systems
… the magnetic couplings present in these types of systems, they are often multiconfigurational in nature, making them difficult to model with tradi- tional single-reference approaches. Methods to handle these types of strongly correlated systems have been developed but often have significant …
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Density Matrix Renormalization Group Studies of Strongly Correlated Systems in Low Dimensions
… method (DMRG) is a powerful numerical method for strongly correlated systems, which often cannot be solved analytically either by the mean field approach or through perturbation. The DMRG is originally proposed as an iterative search of the ground state in one dimension. With more researchers …
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PRECISION MEASUREMENT TO STUDY STRONGLY CORRELATED SYSTEMS-FROM A SINGLE ION TO PHONONS IN AN ION CHAIN
Emulation of isolated strongly correlated quantum many-body systems has been a subject of intense experimental and theoretical research in recent years. Trapped ions are well-controlled quantum systems and the ideal choice for studying the strongly correlated systems to unfold the correlated …
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Advances And Applications Of Static And Dynamic Correlation Methods In Ab-Initio Quantum Chemistry
… to be considered and the importance of such systems cannot be over-emphasized. Addressing such systems with ab-initio methods is still a quantum chemist’s dream. ¨ Brute force solutions of the Schrodinger equation are not possible for reasonably interesting and important systems due to the …
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The Study of Transition Metal Oxides using Dynamical Mean Field Theory
… correlation in transition metal oxides. In the systems with large Coulomb interaction, especially the on-site interaction, electrons are much more correlated and cannot be described using traditional one-electron picture, thus the name "strongly correlated systems". With strong correlation, …
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Fermions at finite density in the nonrelativistic gauge/gravity duality
… has provided a new tool to investigate strongly correlated systems in condensed matter physics. This thesis presents the computation of retarded fermion Green functions at finite density and zero temperature in the nonrelativistic gauge/gravity duality. We find evidence of Fermi surfaces …
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Strongly correlated ultra-cold bosonic atoms in optical lattices
… to quantum critical points. Exotic phenomena in strongly correlated systems occur due to competing complex interactions of spin, charge, lattice, and orbital degrees of freedom. Complex quantum phases in strongly correlated systems are challenging, but they might be very useful due to their …
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Exact diagonalization study of strongly correlated topological quantum states
A rich variety of phases can exist in quantum systems. For example, the fractional quantum Hall states have persistent topological characteristics that derive from strong interaction. This thesis uses the exact diagonalization method to investigate quantum lattice models with strong interaction. …
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Inelastic light scattering studies of quantum phase transitions in CuxTiSe2 and multiferroic TbMnO3
… magnetic-field-induced phase transitions of two strongly correlated systems – the magnetoelectric multiferroic TbMnO3 and the layered dichalcogenide TiSe2 . In general, strongly correlated materials have a strong coupling between charge, spin, lattice and orbital degrees of freedom. Because of …
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Signatures of hydrodynamic transport in an electron system
Electrons in strongly-correlated systems move in a neatly coordinated manner, in many ways resembling the movement of viscous fluids and leading to surprising collective behaviors. Here we explore how the hydrodynamic behavior manifests itself in the electron transport through nanoscale …
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