Inhomogeneous structures in holographic superfluids. I. Dark solitons
Inhomogeneous structures in holographic superfluids. I. Dark solitons
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DOI：
10.1103/physrevd.81.126011
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发表时间：
2009-11
影响因子：
5
通讯作者：
V. Keranen;E. Keski-Vakkuri;S. Nowling;K. Yogendran
中科院分区：
文献类型：
--
作者：
V. Keranen;E. Keski-Vakkuri;S. Nowling;K. Yogendran
我们开始研究全息超流体的非均匀结构。作为第一个例子，我们研究了3+1维爱因斯坦-麦克斯韦-希格斯理论中的畴壁状缺陷，该理论是作为全息超导体的对偶模型而发展的。在文献[1]中，我们报道了全息超流体中的这种“暗孤子”。在这项工作中，我们提出了一个广泛的数值研究，他们的属性，工作在探头限制。我们构造了两种可能的凝聚算符的暗孤子，发现它们与标准超流算符有共同的特征。然而，这两个特征是由两个不同的相干长度尺度（一个为序参量，一个为电荷凝聚）。研究了两种凝聚体中的相对电荷耗尽因子，发现两种凝聚体中的孤子具有非常明显的耗尽特性。我们还研究了全息超流体上的准粒子激发，发现激发的尺度与孤子相干长度尺度相当。
We begin an investigation of inhomogeneous structures in holographic superfluids. As a first example, we study domain wall like defects in the 3+1 dimensional Einstein-Maxwell-Higgs theory, which was developed as a dual model for a holographic superconductor. In [1], we reported on such 'dark solitons' in holographic superfluids. In this work, we present an extensive numerical study of their properties, working in the probe limit. We construct dark solitons for two possible condensing operators, and find that both of them share common features with their standard superfluid counterparts. However, both are characterized by two distinct coherence length scales (one for order parameter, one for charge condensate). We study the relative charge depletion factor and find that solitons in the two different condensates have very distinct depletion characteristics. We also study quasiparticle excitations above the holographic superfluid, and find that the scale of the excitations is comparable to the soliton coherence length scales.