Work

Equation of State of a Fermi Gas in the BEC-BCS Crossover: A Quantum Monte Carlo Study

Year: 2004

Type: article

Abstract: We calculate the equation of state of a two-component Fermi gas with attractive short-range interspecies interactions using the fixed-node diffusion Monte Carlo method. The interaction strength is varied over a wide range by tuning the value a of the s-wave scattering length of the two-body potential. For a>0 and a smaller than the inverse Fermi wave vector our results show a molecular regime with repulsive interactions well described by the dimer-dimer scattering length a(m)=0.6a. The pair correlation functions of parallel and opposite spins are also discussed as a function of the interaction strength.

Source: Physical Review Letters

DOI: 10.1103/physrevlett.93.200404

Authors: G. E. Astrakharchik, J. Boronat, J. Casulleras, and S. Giorgini

Institutions: University of Trento, Institute of Spectroscopy, Universitat Politècnica de Catalunya

Language: English

Topic: Cold Atom Physics and Bose-Einstein Condensates

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W2004000433

FWCI: 25.49

Cites: 23

Cited by: 527

Related to: 10