有限温度下异常重力磁矩和轴向涡效应的非普适性

Matteo Buzzegoli, D. Kharzeev
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引用次数: 5

摘要

大质量狄拉克费米子的自旋与介质角动量(即引力磁矩)之间的耦合在有限温度下通过QED相互作用被重新规格化。这意味着反常重力磁矩(AGM)不会消失,并意味着热效应可以打破量子场论中的爱因斯坦等效原理,如前所述。我们还表明,AGM引起了由量子相对论流体中涡度引起的大质量费米子轴流的辐射修正,类似于之前对无质量费米子的发现。辐射QCD效应会显著影响重离子碰撞中极化强子的产生。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Anomalous gravitomagnetic moment and nonuniversality of the axial vortical effect at finite temperature
The coupling between the spin of a massive Dirac fermion and the angular momentum of the medium, i.e. the gravitomagnetic moment, is shown here to be renormalized by QED interactions at finite temperature. This means that the anomalous gravitomagnetic moment (AGM) does not vanish, and implies that thermal effects can break the Einstein equivalence principle in quantum field theory, as argued previously. We also show that the AGM causes radiative corrections to the axial current of massive fermions induced by vorticity in quantum relativistic fluids, similarly to the previous findings for massless fermions. The radiative QCD effects on the AGM should significantly affect the production of polarized hadrons in heavy-ion collisions.
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