Jan 13 – 16, 2020
IFPU, Miramare campus, Trieste, Italy
Europe/Rome timezone

Gravity-induced quantum anomalies through gravitational wave polarization

Not scheduled
IFPU, Miramare campus, Trieste, Italy

IFPU, Miramare campus, Trieste, Italy

Via Beirut 2, Trieste, Italy


Adrian del Rio


Axial-type anomalies predicted by quantum field theory in curved spacetime are determined by the Chern-Pontryagin invariant of the spacetime background. I will show that this geometric quantity is non-zero in spacetimes admitting gravitational radiation that propagates to future null infinity with an excess of one polarization mode over the other. I will further argue that typical scenarios where this gravitational asymmetry occurs include mergers of precessing binary black holes or in head-on collisions of black holes with misaligned spins, since these systems are not even under parity transformations. Some applications in the context of the electric-magnetic duality anomaly will be discussed.

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