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arXiv 2006.16031hep-thhep-phnucl-th
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全息术中的非平衡手征涡旋效应

Out of equilibrium Chiral Vortical Effect in Holography

Sergio Morales-Tejera, Karl Landsteiner

摘要:

研究了强耦合全息场论中远离平衡态的手征涡旋效应。旋转被表示为通过重力磁场上的五维带电AdS Vaidya度规的扰动。我们还引入了线性标量场背景下的动量弛豫机制,研究了电荷、温度和动量弛豫对CVE动力学的影响。远离平衡的行为表明,与背景度量的准瞬时平衡相比,CVE的建立具有显著的时间延迟。我们还特别注意了重力对轴向流CVE轴向异常的影响。我们开发了这个延迟的解析估计,并计算了平衡附近的准正常模式,确定后期的时间振铃。

英文摘要:

We study the chiral vortical effect far from equilibrium in a strongly coupled holographic field theory. Rotation is represented as a perturbation via a gravito-magnetic field on top of a five-dimensional charged AdS Vaidya metric. We also introduce a momentum relaxation mechanism by linear scalar field backgrounds and study the CVE dynamics as function of the charges, temperature and momentum relaxation. The far from equilibrium behavior shows that the CVE builds up with a significant delay in time compared to the quasi instantaneous equilibration of the background metric. We also pay special attention to the effects of the gravitational contribution to the axial anomaly in the CVE of the axial current. We develop an analytic estimate of this delay and also compute the quasi-normal modes near equilibrium which determine the late time ring down.

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