Holographic quantum tasks with input and output regions

TL;DR

This paper extends the study of holographic quantum tasks to regions rather than points, deriving stronger geometric constraints and revealing new boundary-bulk correlations in AdS/CFT.

Contribution

It introduces a framework for quantum tasks with extended spacetime regions, strengthening the connected wedge theorem and uncovering novel boundary-bulk relations.

Findings

Enhanced constraints on bulk geometry from extended regions

Improved connected wedge theorem with larger bulk regions

Non-trivial boundary correlations in Poincaré-AdS_{2+1}

Abstract

Quantum tasks are quantum computations with inputs and outputs occurring at specified spacetime locations. Considering such tasks in the context of AdS/CFT has led to novel constraints relating bulk geometry and boundary entanglement. In this article we consider tasks where inputs and outputs are encoded into extended spacetime regions, rather than the points previously considered. We show that this leads to stronger constraints than have been derived in the point based setting. In particular we improve the connected wedge theorem, appearing earlier in 1912.05649, by finding a larger bulk region whose existence implies large boundary correlation. As well, we show how considering extended input and output regions leads to non-trivial statements in Poincar\'e-AdS$_{2+1}$, a setting where the point-based connected wedge theorem is always trivial.