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arXiv 1608.08595hep-thcond-mat.mes-hallhep-phnucl-th
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全息术的反常输运:I部分

Anomalous transport from holography: Part I

Yanyan Bu, Michael Lublinsky, Amir Sharon

摘要:

我们重新讨论了带电等离子体中手征反常引起的输运性质,全息对偶于Schwarzschild- $AdS_5$中的反常$U(1)_V\times U(1)_A$ Maxwell理论。矢量和轴向电流的离壳本构关系推导出各种近似概括了大多数已知的文献中异常引起的现象,并揭示了一些新的。在弱外场近似下,本构关系的所有阶导数被分解为六个动量相关的输运系数函数:扩散,电/磁电导率和三个异常诱导函数。后者概括了手性磁性和手性分离效应。假设存在恒定的背景外场的非线性输运进行了研究。当磁场是唯一的外磁场时,手征磁效应(包括磁场的各阶非线性)被证明是精确的,并计算了电场和轴向外磁场对本构关系的非线性修正.

英文摘要:

We revisit the transport properties induced by the chiral anomaly in a charged plasma holographically dual to anomalous $U(1)_V\times U(1)_A$ Maxwell theory in Schwarzschild-$AdS_5$. Off-shell constitutive relations for vector and axial currents are derived using various approximations generalising most of known in the literature anomaly-induced phenomena and revealing some new ones. In a weak external field approximation, the constitutive relations have all-order derivatives resummed into six momenta-dependent transport coefficient functions: the diffusion, the electric/magnetic conductivity, and three anomaly induced functions. The latter generalise the chiral magnetic and chiral separation effects. Nonlinear transport is studied assuming presence of constant background external fields. The chiral magnetic effect, including all order nonlinearity in magnetic field, is proven to be exact when the magnetic field is the only external field that is turned on. Non-linear corrections to the constitutive relations due to electric and axial external fields are computed.

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