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arXiv quant-ph/0305133quant-ph
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谐波势阱中的双组分费米气体

Two-component Fermi gas in a Harmonic Trap

X. X. Yi, H. J. Wang, H. T. Cui, C. M. Zhang

摘要:

我们考虑低温下两组分费米气体的混合物。在半经典近似下计算了这种简并费米气体的密度分布。结果表明,费米子-费米子相互作用对低温下的密度分布有较大的修正。讨论了在原子间相互吸引和排斥作用下混合物的相分离,数值计算表明混合物存在一个稳定的温度区域$T_{c1}<T<T_{c2}$.此外,在半经典近似下,我们给出了该系统BCS型相变的临界温度。

英文摘要:

We consider a mixture of two-component Fermi gases at low temperature. The density profile of this degenerate Fermi gas is calculated under the semiclassical approximation. The results show that the fermion-fermion interactions make a large correction to the density profile at low temperature. The phase separation of such a mixture is also discussed for both attractive and repulsive interatomic interactions, and the numerical calculations demonstrate the exist of a stable temperature region $T_{c1}<T<T_{c2}$ for the mixture. In addition, we give the critical temperature of the BCS-type transition in this system beyond the semiclassical approximation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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