Communication between general-relativistic observers without a shared reference frame

TL;DR

This paper demonstrates a method for quantum communication between general-relativistic observers without a shared reference frame, leveraging preserved quantum correlations despite unknown transformations.

Contribution

It introduces a protocol that exploits invariant quantum correlations to enable reliable information transfer without a shared reference frame.

Findings

Quantum information can be reliably encoded and transmitted without a shared reference frame.

Certain quantum correlations remain invariant under unknown Bogolyubov transformations.

The proposed method efficiently utilizes these correlations for communication.

Abstract

We show how to reliably encode quantum information and send it between two arbitrary general-relativistic observers without a shared reference frame. Any information stored in a quantum field will inevitably be destroyed by an unknown Bogolyubov transformation relating the observers. However certain quantum correlations between different, independent fields will be preserved, no matter what transformation is applied. We show how to efficiently use these correlations in communication between arbitrary observers.