s波和p波费米凝聚体中的物质波干涉
Matter-wave interference in s-wave and p-wave Fermi condensates
摘要：
本文讨论了s波和p波超流体的费什巴赫共振的BEC侧费米凝聚从谐波陷阱中释放时的时间演化和物质波干扰。在序参量为复标量的swave系统中，我们发现干涉图样依赖于凝聚体的序参量的相对相位。在包含两个超精细态混合的p波系统中，我们证明了干涉图样的偏振效应依赖于两个矢量序参量的相对取向。最后，我们还指出p波费米凝聚呈现出各向异性的膨胀，反映了费米子间相互作用的空间各向异性和矢量序参量的轨道性质.我们的研究结果的潜在应用包括系统的超冷原子，表现出p波费什巴赫共振，如6Li或40 K。
英文摘要：
We discuss the time evolution and matter-wave interference of Fermi condensates on the BEC side of Feshbach resonances for s and p-wave superfluids, upon release from harmonic traps. In swave systems, where the order parameter is a complex scalar, we find that the interference patterns depend on the relative phase of the order parameters of the condensates. In p-wave systems involving the mixture of two-hyperfine states, we show that the interference pattern exhibits a polarization effect depending on the relative orientation of the two vector order parameters. Lastly, we also point out that p-wave Fermi condensates exhibit an anisotropic expansion, reflecting the spatial anisotropy of the underlying interaction between fermions and the orbital nature of the vector order parameter. Potential applications of our results include systems of ultra-cold atoms that exhibit p-wave Feshbach resonances such as 6Li or 40K.
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