Quantum Monte Carlo Method Applied to Strongly Correlated Dilute Fermi Gases with Finite Effective Range

International Journal of Modern Physics E (Impact Factor: 1.34). 04/2009; 18(04):919-925. DOI: 10.1142/S0218301309013051
Source: arXiv


We discuss the Auxiliary Field Quantum Monte Carlo (AFQMC) method
applied to dilute neutron matter at finite temperatures. We formulate
the discrete Hubbard-Stratonovich transformation for the interaction
with finite effective range which is free from the sign problem. The
AFQMC results are compared with those obtained from exact
diagonalization for a toy model. Preliminary calculations of energy and
chemical potential as a function of temperature are presented.

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