Quantum Communication with an Accelerated Partner

TL;DR

This paper develops a quantum field theoretical model for directional quantum communication between localized parties, analyzing the efficiency of quantum key distribution between an inertial sender and an accelerated receiver.

Contribution

It introduces a tractable approach based on Heisenberg evolution of localized field observables to model relativistic quantum communication.

Findings

Derived approximate analytical solutions for communicating coherent states.

Evaluated the efficiency of continuous variable quantum key distribution in relativistic settings.

Provided insights into quantum communication involving accelerated observers.

Abstract

An unsolved problem in relativistic quantum information research is how to model efficient, directional quantum communication between localised parties in a fully quantum field theoretical framework. We propose a tractable approach to this problem based on solving the Heisenberg evolution of localized field observables. We illustrate our approach by analysing, and obtaining approximate analytical solutions to, the problem of communicating coherent states between an inertial sender, Alice and an accelerated receiver, Rob. We use these results to determine the efficiency with which continuous variable quantum key distribution could be carried out over such a communication channel.