Some Findings on the Minus-Sign Problem for the Hubbard Model in the Projector Quantum Monte Carlo Method : General Physics
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概要
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The quantum Monte Carlo method for the Hubbard model using the Hubbard-Stratonovich transformation is reexamined. It is observed that the value of the ground state energy for a 3 × 2 and 4 × 4 system is estimated correctly by ignoring the minus-sign of the negative sampling weight appearing in the simulation using the projector method. It is also observed that the average of sign is positive and the correlation between the energy and the sign is weak for these systems. The reasons why the ground state energy is estimated correctly is given on a phenomenological base.
- 社団法人日本物理学会の論文
- 2001-06-15
著者
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Ito Nobuyasu
Department Of Applied Physics Faculty Of Engineering The University Of Tokyo
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Ito Nobuyasu
Department Of Applied Physics School Of Engineering The University Of Tokyo:the Institute Of Statist
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Matuttis Hans-georg
Department Of Applied Physics School Of Engineering The University Of Tokyo
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Ito Nobuyasu
Department of applied Physics
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