Huang Xu-Guang, Liao Jinfeng
Physics Department and Center for Exploration of Energy and Matter, Indiana University, 2401 North Milo B. Sampson Lane, Bloomington, Indiana 47408, USA.
Physics Department and Center for Exploration of Energy and Matter, Indiana University, 2401 North Milo B. Sampson Lane, Bloomington, Indiana 47408, USA and RIKEN BNL Research Center, Building 510A, Brookhaven National Laboratory, Upton, New York 11973, USA.
Phys Rev Lett. 2013 Jun 7;110(23):232302. doi: 10.1103/PhysRevLett.110.232302. Epub 2013 Jun 6.
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 a very general basis, we argue that the strength of CESE is proportional to μ(V)μ(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 effects of CESE in heavy-ion collisions are also discussed.
我们研究了在外部电场中包含带电手性费米子的相对论性等离子体。我们表明，在矢量和轴矢电荷密度都存在的情况下，电场可以沿其方向诱导出一个轴矢流，从而导致手性分离。我们将其称为手性电分离效应（CESE）。在非常一般的基础上，我们认为CESE的强度与μ(V)μ(A)成正比，其中μ(V)和μ(A)分别是矢量电荷和轴矢电荷的化学势。然后我们在热量子电动力学中以领先对数阶明确计算了这个CESE电导率系数。CESE可以表现出一种沿电场传播的新的无隙波模式。我们还讨论了CESE在重离子碰撞中可能的可观测效应。
