超流费米气体中的暗孤子
Dark solitons in a superfluid Fermi gas
摘要：
通过求解Bogoliubov-deGennes方程组，并寻找序参量的实解和奇解，研究了超流费米气体中暗孤子沿BCS-BEC交叉的行为.我们发现，在共振幺正区，散射长度是大的，孤子的密度分布有一个深的最小值，不同的BCS制度中发生的。超流间隙被发现是显着淬火的孤子的存在，由于Andreev费米子束缚态的发生本地化附近的节面的序参量。
英文摘要：
We investigate the behavior of dark solitons in a superfluid Fermi gas along the BCS-BEC crossover by solving the Bogoliubov - de Gennes equations and looking for real and odd solutions for the order parameter. We show that in the resonance unitary region, where the scattering length is large, the density profile of the soliton has a deep minimum, differently from what happens in the BCS regime. The superfluid gap is found to be significantly quenched by the presence of the soliton due to the occurrence of Andreev fermionic bound states localized near the nodal plane of the order parameter.
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