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Visar resultat 1 - 5 av 8 avhandlingar som matchar ovanstående sökkriterier.

  1. 1. Strongly Correlated Models in One Dimension from a Density Matrix Renormalization Group Perspective

    Författare :Stefan Rommer; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; matrix product states; impurities; density matrix renormalization group; Heisenberg model; spin chain; DMRG;

    Sammanfattning : The density matrix renormalization group (DMRG) is a numerical method for studying low dimensional strongly correlated models. The study of these models is one of the most active areas of condensed matter physics today and has been spurred not only by the discovery of high temperature superconductivity but also by experiments on new compounds. LÄS MER

  3. 2. Density Matrix Renormalization Group approach to anisotropic 3-dimensional bosons

    Författare :Gunnar Bollmark; Adrian Kantian; Salvatore Manmana; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : .... LÄS MER

  4. 3. Density-Matrix Renormalization-Group Analysis of Kondo and XY models

    Författare :Ausrius Juozapavicius; KTH; []
    Nyckelord :Quantum spin chain; DMRG; XY model; Ising model; Kondo lattice model; magnetization;

    Sammanfattning : .... LÄS MER

  5. 4. Numerical Renormalization, Doped Antiferromagnets, and Statistics - Topics in Low Dimensional Physics

    Författare :Martin Andersson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Josephson junctions; matrix-product states; fictitious flux; phase-separation; renormalization; stripes; t-J model; anyons; DMRG;

    Sammanfattning : The first part of the thesis deals with so called numerical renormalization group methods, and in particular the density-matrix renormalization group (DMRG). This method performs extremely well for large one-dimensional quantum systems like spin-chains and Hubbard models. LÄS MER

  7. 5. Density-matrix renormalization-group analysis of quantum phase transitions in disordered spin chains

    Författare :Laura Gabriela Urba; KTH; []
    Nyckelord :Quantum Phase Transitions; Spin Chains; Disordered Systems; Critical Phenomena;

    Sammanfattning : .... LÄS MER