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arXiv 1612.04845cond-mat.quant-gasnlin.PS
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费米超流体中孤子训练的集体模

Collective modes of a soliton train in a Fermi superfluid

Shovan Dutta, Erich J. Mueller

摘要:

利用平均场理论,我们刻画了准一维费米超流体中孤子训练的集体模。除了预期的戈德斯通和希格斯模式,我们发现新的长寿命的间隙模式与孤子核心的振荡。孤子训练的不稳定性强烈依赖于相互作用强度和孤子间距。它可以通过用未成对的费米子填充每个孤子来稳定,从而形成相称的富尔德-费雷尔-拉金-奥夫钦尼科夫(FFLO)相。我们发现这样的状态总是动态稳定的,这为通过相位印记在实验中实现长寿命的FFLO状态铺平了道路。

英文摘要:

We characterize the collective modes of a soliton train in a quasi-one-dimensional Fermi superfluid, using a mean-field formalism. In addition to the expected Goldstone and Higgs modes, we find novel long-lived gapped modes associated with oscillations of the soliton cores. The soliton train has an instability that depends strongly on the interaction strength and the spacing of solitons. It can be stabilized by filling each soliton with an unpaired fermion, thus forming a commensurate Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) phase. We find that such a state is always dynamically stable, which paves the way for realizing long-lived FFLO states in experiments via phase imprinting.

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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