Weyl Superfluidity in a Three-Dimensional Dipolar Fermi Gas
Weyl Superfluidity in a Three-Dimensional Dipolar Fermi Gas
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三维偶极费米气体中的韦尔超流性
DOI：
10.1103/physrevlett.114.045302
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发表时间：
2015-01-28
影响因子：
8.6
通讯作者：
Liu, W. Vincent
中科院分区：
文献类型：
--
作者：
Liu, Bo;Li, Xiaopeng;Liu, W. Vincent
外尔超导电性或超流性，是一种迷人的物质拓扑状态，具有新的现象，如涌现的外尔费米子激发和异常。在这里，我们报告，各向异性外尔超流态可以出现作为一个低温稳定相在3D偶极费米气体。我们的模型的一个重要组成部分是一个方向依赖的两体有效吸引力所产生的旋转外场。实验签名预测冷气体的射频光谱。研究了该系统的有限温度相图，发现外尔超流性的转变温度在原子偶极费米气体的实验范围内。
Weyl superconductivity or superfluidity, a fascinating topological state of matter, features novel phenomena such as emergent Weyl fermionic excitations and anomalies. Here we report that an anisotropic Weyl superfluid state can arise as a low temperature stable phase in a 3D dipolar Fermi gas. A crucial ingredient of our model is a direction-dependent two-body effective attraction generated by a rotating external field. Experimental signatures are predicted for cold gases in radio-frequency spectroscopy. The finite temperature phase diagram of this system is studied and the transition temperature of the Weyl superfluidity is found to be within the experimental scope for atomic dipolar Fermi gases.