Unconstrained Summoning for relativistic quantum information processing

TL;DR

This paper introduces a summoning task in relativistic quantum information, demonstrating that any classically feasible task remains possible in the quantum realm when classical inputs are unconstrained.

Contribution

It establishes the equivalence of classical and quantum summoning tasks under unconstrained inputs, expanding understanding of quantum information propagation in relativistic settings.

Findings

Quantum summoning matches classical feasibility under unconstrained inputs

Any classical summoning task is achievable quantum mechanically in this scenario

The work bridges classical and quantum information tasks in relativistic contexts

Abstract

We define a summoning task to require propagating an unknown quantum state to a point in space-time belonging to a set determined by classical inputs at points in space-time. We consider the classical analogue, in which a known classical state must be returned at precisely one allowed point. We show that, when the inputs are unconstrained, any summoning task that is possible in the classical case is also possible in the quantum case.