Speaker
Pavel Buividovich
(Regensburg University)
Description
We study interacting Dirac fermions with chirality imbalance in the mean-field approximation and find that the chiral imbalance is strongly enhanced due to spontaneous chiral symmetry breaking. This result is valid both for the breaking of the exact chiral symmetry and for the pion condensation phase in the case of Wilson-Dirac fermions. We then consider the Chiral Magnetic Effect (CME) in the linear response approximation and find that in a phase with broken chiral symmetry the CME current is saturated by vector mesons with different polarizations, which are mixed in chirally imbalanced matter. It turns out that the CME is strongly enhanced in a phase with broken symmetry. We also argue that Weyl semimetals with chiral imbalance are free of the sign problem by virtue of time-reversal symmetry and can be efficiently simulated using the Rational Hybrid Monte-Carlo algorithm.
Author
Pavel Buividovich
(Regensburg University)
