Quantum Monte Carlo by message passing
We summarize results of quantum Monte Carlo simulations of the degenerate single-impurity Anderson model using the impurity algorithm of Hirsch and Fye. Using methods of Bayesian statistical inference, coupled with the principle of maximum entropy, we extracted the single-particle spectral density from the imaginary-time Green's function. The variations of resulting spectral densities with model parameters agree qualitatively with the spectral densities predicted by NCA calculations. All the simulations were performed on a cluster of 16 IBM R6000/560 workstations under the control of the message-passing software PVM. We described the trivial parallelization of our quantum Monte Carlo code both for the cluster and the CM-5 computer. Other issues for effective parallelization of the impurity algorithm are also discussed.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 6496468
- Report Number(s):
- LA-UR-93-1296; CONF-9302112-2; ON: DE93012645
- Resource Relation:
- Conference: Madi Gras conference on concurrent computing in the physical sciences, Baton Rouge, LA (United States), 18-20 Feb 1993
- Country of Publication:
- United States
- Language:
- English
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SUPERCONDUCTIVITY AND SUPERFLUIDITY
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
DILUTE ALLOYS
MONTE CARLO METHOD
PARALLEL PROCESSING
ALGORITHMS
COMPUTERIZED SIMULATION
GREEN FUNCTION
HAMILTONIANS
KONDO EFFECT
MAGNETIC MATERIALS
MAGNETIC MOMENTS
MAGNETIC SUSCEPTIBILITY
ALLOYS
CALCULATION METHODS
FUNCTIONS
MAGNETIC PROPERTIES
MATERIALS
MATHEMATICAL LOGIC
MATHEMATICAL OPERATORS
PHYSICAL PROPERTIES
PROGRAMMING
QUANTUM OPERATORS
SIMULATION
665000* - Physics of Condensed Matter- (1992-)
990200 - Mathematics & Computers