Off-Diagonal Wave Functions and Superconductivity in the Variational Monte Carlo Calculations
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We investigate the two-dimensional Hubbard model by the variational Monte Carlo method. We consider off-diagonal wave functions where we improve the Gutzwiller wave function by multiplying off-diagonal factors. In the 4×4 system, we compare our results with the exact diagonalization. The variational energies are fairly close to the exact values. We show the results for the 10×10 Hubbard model.
- The Review of High Pressure Science and Technology
The Review of High Pressure Science and Technology 7, 154-156, 1998
The Japan Society of High Pressure Science and Technology