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

Gravity-induced quantum anomalies through gravitational wave polarization

Not scheduled
2m
IFPU, Miramare campus, Trieste, Italy

IFPU, Miramare campus, Trieste, Italy

Via Beirut 2, Trieste, Italy

Speaker

Adrian del Rio

Description

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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