Holographic Entanglement and Poincare blocks in three dimensional flat space

TL;DR

This paper introduces a covariant method for calculating holographic entanglement entropy and Poincare blocks in 3D flat space gravity, extending previous AdS/CFT inspired techniques to flat space holography.

Contribution

It develops a covariant prescription for holographic entanglement and Poincare blocks in flat space, including a full extrapolate dictionary for correlator computations beyond the probe limit.

Findings

Proposes a worldline-based covariant prescription for flat space holography.

Extends the method to compute correlators and blocks away from the probe limit.

Provides a framework for flat space holographic entanglement entropy and conformal blocks.

Abstract

We propose a covariant prescription to compute holographic entanglement entropy and Poincare blocks (Global BMS blocks) in the context of three-dimensional Einstein gravity in flat space. We first present a prescription based on worldline methods in the probe limit, inspired by recent analog calculations in AdS/CFT. Building on this construction, we propose a full extrapolate dictionary and use it to compute holographic correlators and blocks away from the probe limit.