We study critical phenomena associated with a spontaneous chiral symmetry breaking in current-driven nonequilibrium steady states by using holography. We find that the critical exponents $(\gamma ,\nu )$ at the tricritical point are asymmetric between the chiral symmetry restored phase and the broken phase. Their values in the broken phase are different from those of the mean-field theory, whereas other critical exponents are the mean-field values. The phase diagram with respect to temperature and current density shows a reentrant structure: the broken chiral symmetry is restored again at low temperatures in the presence of current density.

• Received 22 January 2022
• Accepted 8 July 2022

DOI:https://doi.org/10.1103/PhysRevD.106.026006

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP³.

Published by the American Physical Society