Variational Monte Carlo Analysis of Hubbard Model with Confining Potential : One-dimensional Fermionic Optical Lattice Systems(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
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概要
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We investigate the one-dimensional Hubbard model with a confining potential, which may describe cold fermionic atoms trapped in an optical lattice. Combining the variational Monte Carlo simulations with the new stochastic reconfiguration scheme proposed by Sorella, we present an efficient method to systematically treat the ground state properties of the confined system with a site-dependent potential. By taking into account intersite correlations as well as site-dependent on-site correlations, we are able to describe the coexistence of the metallic and Mott insulating regions, which is consistent with other numerical results. Several possible improvements of the trial states are also addressed.
- 社団法人日本物理学会の論文
- 2007-03-15
著者
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Koga Akihisa
Department Of Applied Physics Osaka University
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Kawakami Norio
Department Of Applied Physics Osaka University
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Kawakami Norio
Department Of Applied Physics Osaka University : Department Of Physics Kyoto University
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FUJIHARA Yusuke
Department of Applied Physics, Osaka University
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Fujihara Yusuke
Department Of Applied Physics Osaka University
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Koga Akihisa
Kyoto Univ. Kyoto
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