利用飞行时间成像方法观察光晶格中费米子原子反铁磁有序态的特征
Time-of-flight imaging method to observe signatures of antiferromagnetically ordered states of fermionic atoms in an optical lattice
摘要：
提出了一种将飞行时间成像方法与费什巴赫共振相结合来探测光晶格中费米子原子反铁磁态的简单方法。在这个方案中，费米子原子在成像过程中的非平凡动力学作为一个探针，相对于在AF状态的平移对称性破缺。精确的数值模拟表明，特征振荡动力学引起的散射过程中，转移AF排序矢量出现在TOF图像，这可以很容易地观察到实验。
英文摘要：
We propose a simple method to detect the antiferromagnetic (AF) state of fermionic atoms in an optical lattice by combining a time-of-flight (TOF) imaging method and a Feshbach resonance. In this scheme, the nontrivial dynamics of fermionic atoms during the imaging process works as a probe with respect to the breaking of the translational symmetry in the AF state. Precise numerical simulations demonstrate that the characteristic oscillatory dynamics induced by the scattering process that transfers an AF ordering vector appears in TOF images, which can be easily observed experimentally.
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