NONEXISTENCE OFd-WAVE-SUPERCONDUCTIVITY IN THE QUANTUM MONTE CARLO SIMULATION OF THE HUBBARD MODEL

Hans-Georg Matuttis () and Nobuyasu Ito ()
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Hans-Georg Matuttis: Department of Mechanical Engineering and Intelligent Systems, The University of Electro-Communications, Chofu, Chofugaoka 1-5-1, Tokyo 182-8585, Japan
Nobuyasu Ito: Department of Applied Physics, School of Engineering, The University of Tokyo, Bunkyo-ku, Tokyo 113-8646, Japan

International Journal of Modern Physics C (IJMPC), 2005, vol. 16, issue 06, 857-866

Abstract: For the existence ofd-wave-superconductivity in the Hubbard model, previous quantum Monte Carlo results by other authors, which showed a power law increase of thed-wave susceptibility, seem to contradict a recently published theorem. We show those quantum Monte Carlo calculations were numerically contaminated, analyze the numerical problem and propose a numerically more stable computing scheme.

Keywords: Hubbard model; minus sign problem; grand canonical quantum Monte Carlo; Hubbard–Stratonovich transformation (search for similar items in EconPapers)
Date: 2005
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DOI: 10.1142/S0129183105007571

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