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arXiv 1303.7192nucl-thhep-phhep-thnucl-ex
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利用电场产生轴向电流:手征电分离效应

Axial Current Generation from Electric Field: Chiral Electric Separation Effect

Xu-Guang Huang, Jinfeng Liao

摘要:

研究了外电场中含有带电手征费米子的相对论等离子体。我们发现,与矢量和轴向电荷密度的存在下,电场可以诱导沿其方向的轴向电流,从而导致手性分离。我们称之为手性电分离效应(CESE)。在一般的基础上,我们认为CESE的强度与$μ_Vμ_A$成正比,其中$μ_V$和$μ_A$是矢量电荷和轴向电荷的化学势.然后,我们显式计算这个CESE电导率系数在热QED在领先的日志顺序。CESE可以表现出一种新的沿电场传播的无隙波模。本文还讨论了在重离子碰撞中CESE的可观测性。

英文摘要:

We study a relativistic plasma containing charged chiral fermions in an external electric field. We show that with the presence of both vector and axial charge densities, the electric field can induce an axial current along its direction and thus cause chirality separation. We call it the Chiral Electric Separation Effect (CESE). On very general basis, we argue that the strength of CESE is proportional to $μ_Vμ_A$ with $μ_V$ and $μ_A$ the chemical potentials for vector charge and axial charge. We then explicitly calculate this CESE conductivity coefficient in thermal QED at leading-log order. The CESE can manifest a new gapless wave mode propagating along the electric field. Potential observable of CESE in heavy-ion collisions is also discussed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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