Holographic Chiral Electric Separation Effect
Holographic Chiral Electric Separation Effect
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DOI：
10.1103/physrevd.89.085024
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发表时间：
2014-01
影响因子：
5
通讯作者：
Shi Pu;Shan Wu;Di-Lun Yang
中科院分区：
文献类型：
--
作者：
Shi Pu;Shan Wu;Di-Lun Yang
利用具有U（1）R × U（1）L对称性的Sakai-Sugimoto模型，研究了强耦合等离子体中同时存在矢量和轴向化学势的电场诱导轴向电流的手征电分离效应.通过在U（1）R和U（1）L扇区中引入不同的化学势，计算了由手征电流引起的轴向直流电导率和正常直流电导率.我们发现，轴向电导率近似成正比的产品的轴向和矢量化学势的化学势的任意大小。我们还评估了轴向交流（AC）电导率诱导的频率依赖性电场，其中相对于频率的振荡行为被观察到。
We investigate the chiral electric separation effect, where an axial current is induced by an electric field in the presence of both vector and axial chemical potentials, in a strongly coupled plasma via the Sakai-Sugimoto model with a U ( 1 ) R × U ( 1 ) L symmetry. By introducing different chemical potentials in U ( 1 ) R and U ( 1 ) L sectors, we compute the axial direct current (DC) conductivity stemming from the chiral current and the normal DC conductivity. We find that the axial conductivity is approximately proportional to the product of the axial and vector chemical potentials for arbitrary magnitudes of the chemical potentials. We also evaluate the axial alternating current (AC) conductivity induced by a frequency-dependent electric field, where the oscillatory behavior with respect to the frequency is observed.