Details
| Original language | English |
|---|---|
| Article number | 043313 |
| Journal | Physical Review A |
| Volume | 104 |
| Issue number | 4 |
| Publication status | Published - 19 Oct 2021 |
Abstract
Quantum Monte Carlo techniques are employed to study the properties of polarons in an ultracold Fermi gas, at , and in the unitary regime using both a zero-range model and a square-well potential. For a fixed density, the potential range is varied and results are extrapolated and compared against a zero-range model. A discussion regarding the choice of an interacting potential with a finite range is presented. We compute the polaron effective mass, the polaron binding energy, and the effective coupling between them. The latter is obtained using the Landau-Pomeranchuk's weakly interacting quasiparticle model. The contact parameter is estimated by fitting the pair distribution function of atoms in different spin states.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics
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In: Physical Review A, Vol. 104, No. 4, 043313, 19.10.2021.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Finite-range effects in the unitary Fermi polaron
AU - Pessoa, Renato
AU - Vitiello, S. A.
AU - Ardila, L. A. Pena
N1 - Funding Information: We thank Dr. Airton Deppman for his support of our work. Computations were performed at the Laboratório de Computação Científica - Universidade Federal de Goiás, at facilities provided by the project INCT-FNA Proc. No. 464 898/2014-5 and at the Centro Nacional de Processamento de Alto Desempenho em São Paulo (CENAPAD-SP). S.A.V. acknowledges financial support from the Brazilian agency, Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP), project Proc. No. 2016/17612-7. L. A. P. A. acknowledges support of the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany's Excellence Strategy, EXC2123QuantumFrontiers, 390837967 and FOR2247.
PY - 2021/10/19
Y1 - 2021/10/19
N2 - Quantum Monte Carlo techniques are employed to study the properties of polarons in an ultracold Fermi gas, at , and in the unitary regime using both a zero-range model and a square-well potential. For a fixed density, the potential range is varied and results are extrapolated and compared against a zero-range model. A discussion regarding the choice of an interacting potential with a finite range is presented. We compute the polaron effective mass, the polaron binding energy, and the effective coupling between them. The latter is obtained using the Landau-Pomeranchuk's weakly interacting quasiparticle model. The contact parameter is estimated by fitting the pair distribution function of atoms in different spin states.
AB - Quantum Monte Carlo techniques are employed to study the properties of polarons in an ultracold Fermi gas, at , and in the unitary regime using both a zero-range model and a square-well potential. For a fixed density, the potential range is varied and results are extrapolated and compared against a zero-range model. A discussion regarding the choice of an interacting potential with a finite range is presented. We compute the polaron effective mass, the polaron binding energy, and the effective coupling between them. The latter is obtained using the Landau-Pomeranchuk's weakly interacting quasiparticle model. The contact parameter is estimated by fitting the pair distribution function of atoms in different spin states.
UR - http://www.scopus.com/inward/record.url?scp=85117930731&partnerID=8YFLogxK
U2 - 10.48550/arXiv.2110.13099
DO - 10.48550/arXiv.2110.13099
M3 - Article
VL - 104
JO - Physical Review A
JF - Physical Review A
SN - 2469-9926
IS - 4
M1 - 043313
ER -