Zilch vortical effect, Berry phase, and kinetic theory
Journal Article
·
· Journal of High Energy Physics (Online)
- Fudan Univ., Shanghai (China)
- Inst. for Theoretical and Experimental Physics (ITEP), Moscow (Russia); Moscow Inst. of Physics and Technology (Russia)
- Inst. for Theoretical and Experimental Physics (ITEP), Moscow (Russia); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Goethe Univ., Frankfurt am Main (Germany)
Rotating photon gas exhibits a chirality separation along the angular velocity which is manifested through a generation of helicity and zilch currents. In this paper we study this system using the corresponding Wigner function and construct elements of the covariant chiral kinetic theory for photons from first principles. The Wigner function is solved order-by-order in h and the unconstrained terms are fixed by matching with quantum field theory results. We further consider the zilch and helicity currents and show that both manifestations of the chirality transport originate in the Berry phase of photons similarly to other chiral effects. Constructing the kinetic description from the Wigner function we find that the frame vector needed to fix the definition of spin of a massless particle is, in fact, the vector of the residual gauge freedom for the free Maxwell theory. We also briefly comment on the possible relation between vortical responses in rotating systems of massless particles and the anomalies of underlying quantum field theory.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- LDRD; NSFC
- Grant/Contract Number:
- 89233218CNA000001
- OSTI ID:
- 1787290
- Report Number(s):
- LA-UR--20-25498
- Journal Information:
- Journal of High Energy Physics (Online), Journal Name: Journal of High Energy Physics (Online) Journal Issue: 10 Vol. 2020; ISSN 1029-8479
- Publisher:
- Springer BerlinCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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