Quantum Monte Carlo Methods for Nuclei at Finite Temperature

Details Quantum Monte Carlo Methods for Nuclei at Finite Temperature Quantum Monte Carlo Methods for Nuclei at Finite Temperature

2000-09-05

arxiv.org/abs/nucl-th/0009005v1

Int.J.Mod.Phys. B15 (2001) 1447-1462

Physics

Nuclear Physics

Nuclear Theory

Keynote talk at the Tenth International Conference on Recent Progress in Many-Body Theories, Seattle, September 10 - 15, 1999;

Scientific paper

10.1142/S0217979201005945

We discuss finite temperature quantum Monte Carlo methods in the framework of the interacting nuclear shell model. The methods are based on a representation of the imaginary-time many-body propagator as a superposition of one-body propagators describing non-interacting fermions moving in fluctuating auxiliary fields. Fermionic Monte Carlo calculations have been limited by a ``sign'' problem. A practical solution in the nuclear case enables realistic calculations in much larger configuration spaces than can be solved by conventional methods. Good-sign interactions can be constructed for realistic estimates of certain nuclear properties. We present various applications of the methods for calculating collective properties and level densities.

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