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Title: Vortices in low-density neutron matter and cold Fermi gases

Journal Article · · Physical Review. C
 [1]; ORCiD logo [2];  [3];  [1]
  1. Univ. of Sao Paulo (Brazil)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  3. Arizona State Univ., Tempe, AZ (United States)

Cold gas experiments can be tuned to achieve strongly-interacting regimes such as that of low-density neutron matter found in neutron-stars' crusts. We report T=0 diffusion Monte Carlo results (i) for the ground state of both spin-1/2 fermions with short-range interactions and low-density neutron matter in a cylindrical container, and (ii) properties of these systems with a vortex line excitation. We calculate the equation of state for cold atoms and low-density neutron matter in the bulk systems, and we contrast it to our results in the cylindrical container. We compute the vortex line excitation energy for different interaction strengths, and we find agreement between cold gases and neutron matter for very low densities. We also calculate density profiles, which allow us to determine the density depletion at the vortex core, which depends strongly on the short-ranged interaction in cold atomic gases, but it is of ≈25% for neutron matter in the density regimes studied in this work. Our results can be used to constrain neutron matter properties by using measurements from cold Fermi gases experiments.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); National Science Foundation (NSF); Sao Paulo Research Foundation (FAPESP); XSEDE; USDOE Laboratory Directed Research and Development (LDRD) Program
Grant/Contract Number:
89233218CNA000001; 2018/09191-7; PHY-1404405; AC52-06NA25396; TG-PHY160027; ACI-1548562; AC02-05CH11231
OSTI ID:
1650615
Alternate ID(s):
OSTI ID: 1546380
Report Number(s):
LA-UR-19-22360; TRN: US2202535
Journal Information:
Physical Review. C, Vol. 100, Issue 1; ISSN 2469-9985
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 5 works
Citation information provided by
Web of Science

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Cited By (2)

Bose–Einstein condensation in spherically symmetric traps journal November 2019
Dynamics of Bose–Einstein Condensates Subject to the Pöschl–Teller Potential through Numerical and Variational Solutions of the Gross–Pitaevskii Equation journal May 2020