Path-integral-expanded-ensemble Monte Carlo method in treatment of the sign problem for fermions
2009 (English)In: PHYS REV E, ISSN 1539-3755, Vol. 80, no 6, 66702- p.Article in journal (Refereed) Published
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.
fermion systems, Monte Carlo methods, quantum theory
IdentifiersURN: urn:nbn:se:su:diva-59391DOI: 10.1103/PhysRevE.80.066702ISI: 000273228000085OAI: oai:DiVA.org:su-59391DiVA: diva2:428922
authorCount :32011-07-012011-06-272011-07-01Bibliographically approved