Universality in a 2-Component Fermi System at Finite Temperature
- Institute for Nuclear Theory, University of Washington, Seattle, Washington 98195 (United States)
Thermodynamic properties of a Fermi system close to the unitarity limit, where the 2-body scattering length a approaches {+-}{infinity}, are studied in the high temperature Boltzmann regime. For dilute systems the virial expansion coefficients in the Boltzmann regime are expected, from general arguments, to be universal. A model independent finite temperature T calculation of the third virial coefficient b{sub 3}(T) is presented. At the unitarity limit, b{sub 3}{sup {infinity}}{approx_equal}1.11 is a universal number. The energy density up to the third virial expansion is derived. These calculations are of interest in dilute neutron matter and could be tested in current atomic experiments on dilute Fermi gases near the Feshbach resonance.
- OSTI ID:
- 20957692
- Journal Information:
- Physical Review Letters, Vol. 98, Issue 9; Other Information: DOI: 10.1103/PhysRevLett.98.090403; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
Similar Records
Universality of a two-component Fermi gas with a resonant interaction
Potential Energy of a {sup 40}K Fermi Gas in the BCS-BEC Crossover