确定费米超流体中相干的存在：有限温度下的自旋翻转和自旋保持布拉格散射
Establishing the Presence of Coherence in Atomic Fermi Superfluids: Spin-Flip and Spin-Preserving Bragg Scattering at Finite Temperatures
摘要：
我们证明了有限温度T结构因子之间的差异，称为S_-，与自旋和密度，可以用来作为超冷费米气体的超流性的指示。这一观测结果可用于BCS-玻色-爱因斯坦凝聚交叉气体的双光子布拉格散射实验。我们的计算是必要的自旋和粒子数守恒定律，导致在一般T与两个f-和规则的兼容性适当纳入。因为它适用于一般的散射长度，S-的测量可以是一个有用的，直接的方法来确定超流性发生的地方。
英文摘要：
We show how the difference between the finite temperature T structure factors, called S_-, associated with spin and density, can be used as a indication of superfluidity in ultracold Fermi gases. This observation can be exploited in two photon Bragg scattering experiments on gases which undergo BCS- Bose Einstein condensation crossover. Essential to our calculations is a proper incorporation of spin and particle number conservation laws which lead to compatibility at general T with two f-sum rules. Because it is applicable to general scattering lengths, a measurement of S- can be a useful, direct approach for establishing where superfluidity occurs.
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