Off-Diagonal Wave Function Monte Carlo Studies of Hubbard Model I
Abstract
We propose a Monte Carlo method, which is a hybrid method of the quantumMonte Carlo method and variational Monte Carlo theory,to study the Hubbard model.The theory is based on the off-diagonal and the Gutzwiller type correlation factors which are taken into account by a Monte Carlo algorithm.In the 4×4 system our method is able to reproduce the exact results obtained by the diagonalization. An application is given to investigate the half-filled band case of two-dimensional square lattice.The energy is favorably compared withquantum Monte Carlo data.
- Publication:
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Journal of the Physical Society of Japan
- Pub Date:
- November 1998
- DOI:
- 10.1143/JPSJ.67.3867
- arXiv:
- arXiv:cond-mat/0206033
- Bibcode:
- 1998JPSJ...67.3867Y
- Keywords:
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- Condensed Matter - Strongly Correlated Electrons
- E-Print:
- 9 pages, 11 figures