Path integral Monte Carlo calculation of the momentum distribution of the homogeneous electron gas at finite temperature

B. Militzer, E. L. Pollock, D. M. Ceperley

Research output: Contribution to journalArticle

Abstract

Path integral Monte Carlo (PIMC) simulations are employed to calculate the momentum distribution of the homogeneous electron gas at finite temperature. Open paths are introduced to sample off-diagonal elements of the real-space density matrix. It is demonstrated how the restricted PIMC method can be extended to incorporate open paths in order to allow for the simulations in fermionic systems where a sign problem is present. The computed momentum distribution shows significant deviations from behavior of free fermions when strong correlations are present but agrees with predictions from variational methods.

Original languageEnglish (US)
Pages (from-to)13-20
Number of pages8
JournalHigh Energy Density Physics
Volume30
DOIs
StatePublished - Jan 2019

Keywords

  • Dense plasmas
  • First-principles simulations
  • Momentum distributions
  • Path integral Monte Carlo

ASJC Scopus subject areas

  • Radiation
  • Nuclear and High Energy Physics

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