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Path-integral-expanded-ensemble Monte Carlo method in treatment of the sign problem for fermions
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).
2009 (English)In: PHYS REV E, ISSN 1539-3755, Vol. 80, no 6, 66702- p.Article in journal (Refereed) Published
Abstract [en]

Expanded-ensemble Monte Carlo method with Wang-Landau algorithm was used for calculations of the ratio of partition functions for classes of permutations in the problem of several interacting quantum particles (fermions) in an external field. Simulations for systems consisting of 2 up to 7 interacting particles in harmonic or Coulombic field were performed. The presented approach allows one to carry out calculations for low enough temperatures that makes it possible to extract data for the ground-state energy and low-temperature thermodynamics.

Place, publisher, year, edition, pages
2009. Vol. 80, no 6, 66702- p.
Keyword [en]
fermion systems, Monte Carlo methods, quantum theory
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:su:diva-59391DOI: 10.1103/PhysRevE.80.066702ISI: 000273228000085OAI: oai:DiVA.org:su-59391DiVA: diva2:428922
Note
authorCount :3Available from: 2011-07-01 Created: 2011-06-27 Last updated: 2011-07-01Bibliographically approved

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