The no-drag frame for anomalous chiral fluid

TL;DR

This paper demonstrates the existence of a special frame in anomalous chiral fluids where a stationary obstacle experiences no drag, revealing a superfluid-like behavior with persistent currents that transport entropy, governed by thermodynamics and anomalies.

Contribution

It introduces the concept of a 'no-drag frame' in anomalous fluids and derives the non-dissipative currents using thermodynamics and anomaly coefficients.

Findings

Existence of a no-drag frame where obstacle experiences no resistance.

Anomalous currents transport entropy unlike superfluids.

Thermodynamics determines the magnitude of these currents.

Abstract

We show that for an anomalous fluid carrying dissipationless chiral magnetic and/or vortical currents there is a frame in which a stationary obstacle experiences no drag, but energy and charge currents do not vanish, resembling superfluidity. However, unlike ordinary superfluid flow, the anomalous chiral currents do transport entropy in this frame. We show that the second law of thermodynamics completely determines the amounts of these anomalous non-dissipative currents in the "no-drag frame" as polynomials in temperature and chemical potential with known anomaly coefficients. These general results are illustrated and confirmed by a calculation in the chiral kinetic theory and quark-gluon plasma at high temperature.