Abanov AG, Wiegmann PB. Axial-Current Anomaly in Euler Fluids.
PHYSICAL REVIEW LETTERS 2022;
128:054501. [PMID:
35179946 DOI:
10.1103/physrevlett.128.054501]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Accepted: 01/18/2022] [Indexed: 06/14/2023]
Abstract
We argue that a close analog of the axial-current anomaly of quantum field theories with fermions occurs in the classical Euler fluid. The conservation of the axial current (closely related to the helicity of inviscid barotropic flow) is anomalously broken by the external electromagnetic field as ∂_{μ}j_{A}^{μ}=2E·B, similar to that of the axial current of a quantum field theory with Dirac fermions, such as QED.
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