Kramers-Wannier Approximation for the 3D Ising Model
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概要
- 論文の詳細を見る
We investigate the Kramers-Wannier approximation for the three-dimensional (3D) Ising model. The variational state is represented by an effective 2D Ising model, which contains two variational parameters. We numerically calculate the variational partition function using the corner transfer matrix renormalization group (CTMRG) method, and find its maximum with respect to the variational parameters. The value of the calculated transition point, K_c=0.2184, is only 1.5% less than the true K_c. This result is better than that obtained using the corner transfer tensor renormalization group (CTTRG) approach. The calculated phase transition is mean-field like.
- 理論物理学刊行会の論文
- 2000-03-25
著者
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Okunishi K
Osaka Univ. Suita Jpn
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Okunishi Kouichi
Department Of Physics Faculty Of Science Niigata Univeristy
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Nishino Tomotoshi
Department Of Physics Graduate School Of Science Kobe University
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Nishino Tomotoshi
Department Of Physics Faculty Of Science Kobe University
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Okunishi Kouich
Department Of Physics Faculty Of Science Niigata University
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NISHINO Tomotoshi
Department of Physics, Graduate School of Science Kobe University
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OKUNISHI Kouichi
Department of Applied Physics, Graduate School of Engineering Osaka University
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