@article{e2ae86684f94461fa75b090fa5c3ba39,
title = "Vortices in low-density neutron matter and cold Fermi gases",
abstract = "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.",
author = "Lucas Madeira and Stefano Gandolfi and Schmidt, {Kevin E.} and Bagnato, {Vanderlei S.}",
note = "Funding Information: We thank Alessandro Lovato for the useful discussions. This work was supported by the S{\~a}o Paulo Research Foundation (FAPESP) under the Grant No. 2018/09191-7, and by the National Science Foundation under the Grant No. PHY-1404405. The work of S.G. was supported by the NUCLEI SciDAC program, by the U.S. DOE under contract DE-AC52-06NA25396, by the LANL LDRD program, and by the DOE Early Career Research Program. This work used the Extreme Science and Engineering Discovery Environment (XSEDE) SuperMIC and Stampede2 through the allocation TG-PHY160027, which is supported by National Science Foundation Grant No. ACI-1548562. This research also used resources provided by the Los Alamos National Laboratory Institutional Computing Program, which is supported by the U.S. Department of Energy National Nuclear Security Administration under Contract No. 89233218CNA000001. We also used resources provided by NERSC, which is supported by the US DOE under Contract DE-AC02-05CH11231. Publisher Copyright: {\textcopyright} 2019 American Physical Society.",
year = "2019",
month = jul,
day = "8",
doi = "10.1103/PhysRevC.100.014001",
language = "English (US)",
volume = "100",
journal = "Physical Review C",
issn = "2469-9985",
publisher = "American Physical Society",
number = "1",
}