Abstract
Properties of the ground state of an unpolarized ultracold Fermi gas along the BCS-BEC crossover are investigated by the variational and diffusion Monte Carlo methods. We apply the Wigner-Bethe-Peierls boundary condition in our calculations to avoid any bias from using an interatomic potential with finite effective range. Properties for several values of the scattering length are studied in the range-8≤1/akF≤4, including the unitary limit. The contact parameters as a function of scattering length are obtained by fitting the pair distribution functions for particles with different spins. The energies and contact parameters are in very good agreement with experimental data reported in the literature.
| Original language | English (US) |
|---|---|
| Article number | 053601 |
| Journal | Physical Review A |
| Volume | 100 |
| Issue number | 5 |
| DOIs | |
| State | Published - Nov 4 2019 |
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ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
Cite this
Zero-range Fermi gas along the BCS-BEC crossover. / Pessoa, Renato; Vitiello, S. A.; Schmidt, K. E.
In: Physical Review A, Vol. 100, No. 5, 053601, 04.11.2019.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Zero-range Fermi gas along the BCS-BEC crossover
AU - Pessoa, Renato
AU - Vitiello, S. A.
AU - Schmidt, K. E.
PY - 2019/11/4
Y1 - 2019/11/4
N2 - Properties of the ground state of an unpolarized ultracold Fermi gas along the BCS-BEC crossover are investigated by the variational and diffusion Monte Carlo methods. We apply the Wigner-Bethe-Peierls boundary condition in our calculations to avoid any bias from using an interatomic potential with finite effective range. Properties for several values of the scattering length are studied in the range-8≤1/akF≤4, including the unitary limit. The contact parameters as a function of scattering length are obtained by fitting the pair distribution functions for particles with different spins. The energies and contact parameters are in very good agreement with experimental data reported in the literature.
AB - Properties of the ground state of an unpolarized ultracold Fermi gas along the BCS-BEC crossover are investigated by the variational and diffusion Monte Carlo methods. We apply the Wigner-Bethe-Peierls boundary condition in our calculations to avoid any bias from using an interatomic potential with finite effective range. Properties for several values of the scattering length are studied in the range-8≤1/akF≤4, including the unitary limit. The contact parameters as a function of scattering length are obtained by fitting the pair distribution functions for particles with different spins. The energies and contact parameters are in very good agreement with experimental data reported in the literature.
UR - http://www.scopus.com/inward/record.url?scp=85075030627&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85075030627&partnerID=8YFLogxK
U2 - 10.1103/PhysRevA.100.053601
DO - 10.1103/PhysRevA.100.053601
M3 - Article
AN - SCOPUS:85075030627
VL - 100
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
SN - 1050-2947
IS - 5
M1 - 053601
ER -