Universality and stability for a dilute Bose gas with a Feshbach resonance

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题名:	Universality and stability for a dilute Bose gas with a Feshbach resonance
作者:	Lee, Y.-L., Lee, Y.-W.
贡献者:	Department of Physics, Tunghai University
关键词:	Bose gas;Bosonic atoms;Dilute limit;Equilibrium properties;Feshbach resonances;Fixed points;Ideal Fermi gas;Local minimums;Renormalization group;Scattering length;Unitary limits;Universal scaling;Zero temperatures
日期:	2010
上传时间:	2013-05-24T09:14:30Z (UTC)
摘要:	We study the bosonic atoms with a wide Feshbach resonance at zero temperature in terms of the renormalization group. We indicate that this system will always collapse in the dilute limit. On the side with a positive scattering length, the atomic superfluid is an unstable local minimum in the dilute limit and it determines the thermodynamics of this system within its lifetime. We calculate the equilibrium properties at zero temperature in the unitary regime. They exhibit universal scaling forms in the dilute limit due to the presence of a nontrivial zero temperature, zero-density fixed point. Moreover, we find that the T=0 thermodynamics of this system in the unitary limit is exactly identical to the one for an ideal Fermi gas. ? 2010 The American Physical Society.
關聯:	Physical Review A - Atomic, Molecular, and Optical Physics 81 (6) , art. no. 063613
显示于类别:	[應用物理學系所] 期刊論文

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