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• W907520596 abstract "The investigation of quantum many-particle systems is a central goal of modern condensed-matter physics. Complex physical phenomena such as high-temperature superconductivity, heavy fermion behavior, and correlation-driven metal-insulator transitions are central aspects of this particular field of science. The Hubbard model is a paradigm of correlated-electron physics. It is one of the simplest quantum-mechanical lattice models capable of capturing relevant physical aspects of strongly correlated electron systems. The Hubbard model also plays an important role in the explanation of many-body phenomena observed in ultra-cold atoms trapped in optical lattices. In this thesis, we study the three-dimensional Hubbard model using quantum Monte Carlo simulations (QMC). Our aim is a precise numerical study of its properties in the thermodynamic limit. However, a direct investigation of lattice models in the thermodynamic limit is generally impossible because QMC simulations cannot treat infinite lattice sizes. Therefore, approximative schemes that allow calculations directly in the thermodynamic limit are advantageous. A widely applied approximation of this kind is the dynamical mean-field theory (DMFT) which maps the infinite-lattice problem onto a single-site impurity model embedded in a mean field. We apply cluster mean-field theories which represent a systematic extension of the DMFT by expanding the single impurity to a finite cluster. The second focus of this thesis is the calculation of spectral properties of the Hubbard model. QMC methods map the quantum-mechanical lattice model on a classical one at the expense of an additional imaginary time dimension. For this reason, QMC algorithms can only provide dynamical data on the imaginary time or frequency axis. The necessary analytic continuation to the physically relevant real axis has proven to be a difficult problem that has to be approached by advanced data analysis tools. The maximum-entropy method (MEM) is the standard technique to handle this problem. We apply the MEM to the problem of extracting momentum-resolved single particle spectra from QMC simulations of the 3D Hubbard model. Furthermore, we discuss and expand algorithms that were recently proposed as alternatives to the standard MEM approach." @default.
• W907520596 created "2016-06-24" @default.
• W907520596 creator A5019448190 @default.
• W907520596 date "2022-02-20" @default.
• W907520596 modified "2023-09-24" @default.
• W907520596 title "Thermodynamic and spectral properties of quantum many-particle systems" @default.
• W907520596 cites W1485128342 @default.
• W907520596 cites W1522039040 @default.
• W907520596 cites W1524706172 @default.
• W907520596 cites W1534065249 @default.
• W907520596 cites W1542722034 @default.
• W907520596 cites W1581163326 @default.
• W907520596 cites W1586035099 @default.
• W907520596 cites W1605004650 @default.
• W907520596 cites W161994183 @default.
• W907520596 cites W1626400153 @default.
• W907520596 cites W1642234848 @default.
• W907520596 cites W1657394079 @default.
• W907520596 cites W1657541032 @default.
• W907520596 cites W1671378554 @default.
• W907520596 cites W173759766 @default.
• W907520596 cites W1806543486 @default.
• W907520596 cites W1875695870 @default.
• W907520596 cites W1904445757 @default.
• W907520596 cites W1963651084 @default.
• W907520596 cites W1965143373 @default.
• W907520596 cites W1965653917 @default.
• W907520596 cites W1965930824 @default.
• W907520596 cites W1967823080 @default.
• W907520596 cites W1968379930 @default.
• W907520596 cites W1968548964 @default.
• W907520596 cites W1969939738 @default.
• W907520596 cites W1970735302 @default.
• W907520596 cites W1970897635 @default.
• W907520596 cites W1970956793 @default.
• W907520596 cites W1971455763 @default.
• W907520596 cites W1971477857 @default.
• W907520596 cites W1972068641 @default.
• W907520596 cites W1972810488 @default.
• W907520596 cites W1973025658 @default.
• W907520596 cites W1973663126 @default.
• W907520596 cites W1975915619 @default.
• W907520596 cites W1977616581 @default.
• W907520596 cites W1978733786 @default.
• W907520596 cites W1978959648 @default.
• W907520596 cites W1979308046 @default.
• W907520596 cites W1981068401 @default.
• W907520596 cites W1981492171 @default.
• W907520596 cites W1983628095 @default.
• W907520596 cites W1987080734 @default.
• W907520596 cites W1988150410 @default.
• W907520596 cites W1988720512 @default.
• W907520596 cites W1989252876 @default.
• W907520596 cites W1990455780 @default.
• W907520596 cites W1991687724 @default.
• W907520596 cites W1994581252 @default.
• W907520596 cites W1995140877 @default.
• W907520596 cites W1996784440 @default.
• W907520596 cites W1996979891 @default.
• W907520596 cites W1997126380 @default.
• W907520596 cites W1997470284 @default.
• W907520596 cites W1999392367 @default.
• W907520596 cites W2000006183 @default.
• W907520596 cites W2002821365 @default.
• W907520596 cites W2003523870 @default.
• W907520596 cites W2003582562 @default.
• W907520596 cites W2006429178 @default.
• W907520596 cites W2006650073 @default.
• W907520596 cites W2007391198 @default.
• W907520596 cites W2007600675 @default.
• W907520596 cites W2007695974 @default.
• W907520596 cites W2008348370 @default.
• W907520596 cites W2009773367 @default.
• W907520596 cites W2013145865 @default.
• W907520596 cites W2013588702 @default.
• W907520596 cites W2013697271 @default.
• W907520596 cites W2015836725 @default.
• W907520596 cites W2017474131 @default.
• W907520596 cites W2017521354 @default.
• W907520596 cites W2017723887 @default.
• W907520596 cites W2021108860 @default.
• W907520596 cites W2024060531 @default.
• W907520596 cites W2024471914 @default.
• W907520596 cites W2025042541 @default.
• W907520596 cites W2025980188 @default.
• W907520596 cites W2029204819 @default.
• W907520596 cites W2029256954 @default.
• W907520596 cites W2031794121 @default.
• W907520596 cites W2032317411 @default.
• W907520596 cites W2033092033 @default.
• W907520596 cites W2034012235 @default.
• W907520596 cites W2034376235 @default.
• W907520596 cites W2034393387 @default.
• W907520596 cites W2034731189 @default.
• W907520596 cites W2034979134 @default.
• W907520596 cites W2034987144 @default.
• W907520596 cites W2035159878 @default.
• W907520596 cites W2035413341 @default.
• W907520596 cites W2036941747 @default.
• W907520596 cites W2037262739 @default.

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