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 10 of 10 for “"strongly correlated system"”.
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The structure of paired boson superfluids
… where single bosons condense to form a strongly correlated system and superfluids where pairs of bosons condense to form a strongly correlated system while the single bosons remain uncondensed. First, the classical minimum energy configuration for an ordinary superfluid with and without …
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Percolation and nanosecond fluctuators in V2O3 films within the metal-insulator transition
Vanadium sesquioxide (V2O3) exhibits a first-order metal-insulator transition (MIT) at 160 K between a low temperature, monoclinic, antiferromagnetic Mott insulator and a high temperature, rhombohedral, paramagnetic, metallic phase. In thin films, due to strain, the transition takes place over a …
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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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Studies of strongly-correlated fermions in an optical lattice
… model, allowing investigations of the nature of strongly-correlated fermions in a minimal setting. This thesis describes two such studies. In the first, we observe the momentum relaxation of strongly-correlated fermions in the absence of disorder. We find a violation of the weak-scattering …
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Electronic properties of doped Mott insulators and high temperature superconductors
… which are the quintessential example of a strongly correlated system and the most extensively studied materials after semiconductors, spurred the development in the fields of material science and experimental and theoretical physics. As first noted by Anderson, these materials are doped …
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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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Insights into correlated electron systems from first-principles quantum Monte Carlo
… of accuracy required is difficult to reach in systems where it is important to properly account for electron correlations. I report several benchmarks establishing that variational Monte Carlo (VMC) and fixed-node diffusion Monte Carlo (FN-DMC) are efficient enough to compute properties of …
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First principles quantum Monte Carlo study of correlated electronic systems
… many fascinating phenomena in condensed matter systems, such as high temperature superconductivity, superfluidity, fractional quantum Hall effect, and Mott insulator. Strongly correlated systems have been an important subject of condensed matter physics for several decades, especially after the …
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Phase Transitions in driven 1D and Quasi-Periodic 2D Optical Lattices
… to explore phase transitions in two different systems. The first is the observation of a first-order Mott transition in a resonantly shaken lattice. The second, is the realisation of a two dimensional Bose glass state in an optical quasicrystal. Quasicrystalline patterns posses long-range order …
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Modern Electronic Structure Theory using Tensor Product States
Strongly correlated systems have been a major challenge for a long time in the field of theoretical chemistry. For such systems, the relevant portion of the Hilbert space scales exponentially, preventing efficient simulation on large systems. However, in many cases, the Hilbert space can be …