Gravitational anomalies, entanglement entropy, and flat-space holography

Understand

We introduce a prescription to compute the entanglement entropy of Galilean conformal field theories by combining gravitational anomalies and an \.{I}n\"{o}n\"{u}-Wigner contraction.

• We find that our expression for the entanglement entropy in the thermal limit reproduces the Cardy formula for Galilean conformal field theories.
• Using this proposal, we calculate the entanglement entropy for a class of Galilean conformal field theories, which are believed to be dual to three-dimensional flat-space cosmological solutions.
• These geometries describe expanding (contracting) universes and can be viewed as the flat-space limit of rotating Ba\~nados-Teitelboim-Zanelli black holes.