Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2004-11-09
Phys. Rev. Lett. 95, 120401 (2005)
Physics
Condensed Matter
Statistical Mechanics
RevTex, 4 pages, one figure, a revised version
Scientific paper
10.1103/PhysRevLett.95.120401
We study theoretically the ultracold two-component Fermi gases when a gradient magnetic field is used to tune the scattering length between atoms. For Li6 at the narrow resonance B0=543.25G, it is shown that the gases would be in a coexistence of the regimes of BCS, BEC and unitarity limit with the present experimental technique. In the case of thermal and chemical equilibrium, we investigate the density distribution of the gases and show that a double peak of the density distribution can give us a clear evidence for the coexistence of BCS, BEC and unitarity limit.
Liu Shujuan
Xiong Hongwei
Zhan Ming-sheng
Zhang Weiping
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