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Reptation quantum Monte Carlo: A method for unbiased ground-state averages and imaginary-time correlations

Baroni, S.
•
Moroni, S.
1999
  • journal article

Periodico
PHYSICAL REVIEW LETTERS
Abstract
We introduce a new stochastic method for calculating ground-state properties of quantum systems. Segments of a Langevin random walk guided by a trial wave function are subject to a Metropolis rejection test performed on the time integral of the local energy. The algorithm-which is as simple as variational Monte Carlo-for bosons provides exact expectation values of local observables, as well as their static and dynamic (in imaginary time) response functions, without mixed-estimate nor population-control biases. Our method is demonstrated with a few case applications to (4)He.
DOI
10.1103/PhysRevLett.82.4745
WOS
WOS:000080804300003
Archivio
http://hdl.handle.net/20.500.11767/15892
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-4243756612
Diritti
metadata only access
Soggetti
  • Settore FIS/03 - Fisi...

Scopus© citazioni
190
Data di acquisizione
Jun 7, 2022
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Web of Science© citazioni
189
La settimana scorsa
1
Data di acquisizione
Mar 26, 2024
Visualizzazioni
2
Data di acquisizione
Jun 8, 2022
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