Spin polarized nonrelativistic fermions in 1+1 dimensions

Alexandru, Andrei; Bedaque, Paulo F.; Warrington, Neill C.

doi:10.1103/physrevd.98.054514

Title: Spin polarized nonrelativistic fermions in $1 + 1$ dimensions

Journal Article · 20 September 2018 · Physical Review D

DOI: https://doi.org/10.1103/physrevd.98.054514 · OSTI ID:1471762

Alexandru, Andrei ^[1]; Bedaque, Paulo F. ^[2]; Warrington, Neill C. ^[2]

George Washington Univ., Washington, DC (United States); Univ. of Maryland, College Park, MD (United States)
Univ. of Maryland, College Park, MD (United States)

We study by Monte Carlo methods the thermodynamics of a spin polarized gas of nonrelativistic fermions in 1 + 1 dimensions. The main result of this work is that our action suffers no significant sign problem for any spin polarization in the region relevant for dilute degenerate Fermi gases. This lack of sign problem allows us to study attractive spin polarized fermions nonperturbatively at spin polarizations not previously explored. For some parameters values we verify results previously obtained by methods which include an uncontrolled step like complex Langevin and/or analytical continuation from imaginary chemical potential. For others, larger values of the polarization, we deviate from these previous results.

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Research Organization:: Univ. of Maryland, College Park, MD (United States); George Washington Univ., Washington, DC (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: FG02-93ER40762; FG02-95ER40907; FG02-93ER-40762

OSTI ID:: 1471762

Alternate ID(s):: OSTI ID: 1498928

Journal Information:: Physical Review D, Vol. 98, Issue 5; ISSN 2470-0010

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 9 works

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