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Positive magnetoresistance induced by hydrodynamic fluctuations in chiral media

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arxiv 2105.10271 v2 pith:KSBLPS76 submitted 2021-05-21 hep-th cond-mat.str-elhep-phnucl-th

Noriyuki Sogabe , Naoki Yamamoto , Yi Yin This is my paper · ORCID
classification hep-thcond-mat.str-elhep-phnucl-th
keywords fluctuationschiralmagnetoresistancecme-relatedfieldhydrodynamicmagneticpositive
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We analyze the combined effects of hydrodynamic fluctuations and chiral magnetic effect (CME) for a chiral medium in the presence of a background magnetic field. Based on the recently developed non-equilibrium effective field theory, we show fluctuations give rise to a CME-related positive contribution to magnetoresistance, while the early studies without accounting for the fluctuations find a CME-related negative magnetoresistance. At zero axial relaxation rate, the fluctuations contribute to the transverse conductivity in addition to the longitudinal one.

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