Critical rotational frequency for superfluid fermionic gases across a Feshbach resonance.
Critical rotational frequency for superfluid fermionic gases across a Feshbach resonance.
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DOI：
10.1103/physrevlett.97.180414
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发表时间：
2006-08
影响因子：
8.6
通讯作者：
H. Zhai;T. Ho
中科院分区：
文献类型：
--
作者：
H. Zhai;T. Ho
We present a method to determine the critical rotational frequencies for superfluidity of both uniform and trapped Fermi gases across a wide Feshbach resonance. It is found that as one approaches the resonance from the BCS side, beyond a critical scattering length, pairing is so robust that superfluidity cannot be destroyed by rotation. Moreover, the critical frequency has a sequence of jumps revealing the appearance of Landau levels, which are particularly prominent for systems up to a few thousand particles. For rotational frequency below an ultimate critical frequency, defined to be the lowest frequency at which the center of the cloud goes normal, a trapped gas has a superfluid core surrounded by a normal gas, as seen in recent experiments (C. H. Schunck, cond-mat/0607298).
