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arXiv 1503.04534cond-mat.quant-gas
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具有周期调制相互作用的费米超流体中的燕尾结构

Swallowtail Structure in Fermi Superfluids with Periodically Modulated Interactions

Dongyang Yu, Wei Yi, Wei Zhang

摘要:

本文研究了准一维费米气体中的超流流动,其中空间调制相互作用由光学费什巴赫共振引起。由于调制相互作用的周期性和背景相互作用的非线性之间的竞争,在适当的参数下,在能谱中出现一个有趣的燕尾结构。随着相互作用强度的调整,燕尾结构可能会消失,从而在丰富的相图上产生各种不同的状态。我们研究了不同参数下的序参量和粒子密度的空间分布,这对于实验检测这些系统中的有趣相是有用的。

英文摘要:

We study the superfluid flow in a quasi-one-dimensional Fermi gas with spatially modulated interactions induced by an optical Feshbach resonance. Due to the competition between the periodicity of the modulated interaction and the nonlinearity of the background interaction, an interesting swallowtail structure emerges in the energy spectrum under appropriate parameters. As the interaction strengths are tuned, the swallowtail structure may disappear, giving rise to various different states on a rich phase diagram. We investigate the spatial distribution of the order parameter and the particle density under various parameters, which are useful for the experimental detection of the interesting phases in these systems.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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