Monte Carlo Calculations for Fermi Gases in the Unitary Limit with a Zero-Range Interaction

Renato Pessoa, S. A. Vitiello, Kevin Schmidt

Research output: Contribution to journalArticle

7 Scopus citations

Abstract

An ultracold Fermi gas with a zero-range attractive potential in the unitary limit is investigated using variational and diffusion Monte Carlo methods. Previous calculations have used a finite-range interaction and extrapolate the results to zero-range. Here we extend the quantum Monte Carlo method to directly use a zero-range interaction without the need of an extrapolation. We employ a trial wave function with the correct boundary conditions and modify the sampling procedures to handle the zero-range interaction. The results are reliable and have low variance.

Original languageEnglish (US)
Pages (from-to)168-179
Number of pages12
JournalJournal of Low Temperature Physics
Volume180
Issue number1-2
DOIs
StatePublished - Feb 25 2015

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Keywords

  • Fermi gases
  • Unitary limit
  • Zero-range interaction

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)

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