TY  - JOUR
AU  - Agullo, I.
AU  - del Rio, A.
AU  - Navarro-Salas, J.
PY  - 2017
DA  - 2017//
TI  - Electromagnetic Duality Anomaly in Curved Spacetimes
T2  - Phys. Rev. Lett.
JO  - Physical Review Letters
SP  - 111301
EP  - 5pp
VL  - 118
IS  - 11
PB  - Amer Physical Soc
AB  - The source-free Maxwell action is invariant under electric-magnetic duality rotations in arbitrary spacetimes. This leads to a conserved classical Noether charge. We show that this conservation law is broken at the quantum level in the presence of a background classical gravitational field with a nontrivial Chern-Pontryagin invariant, in parallel with the chiral anomaly for massless Dirac fermions. Among the physical consequences, the net polarization of the quantum electromagnetic field is not conserved.
SN  - 0031-9007
UR  - http://arxiv.org/abs/1607.08879
UR  - https://doi.org/10.1103/PhysRevLett.118.111301
DO  - 10.1103/PhysRevLett.118.111301
LA  - English
N1  - WOS:000396267100003
ID  - Agullo_etal2017
ER  -