Fundamental limitations to information transfer in accelerated frames

TL;DR

This paper investigates the fundamental limits of quantum communication between inertial and accelerated observers, revealing monogamy constraints and optimal parameters for Unruh mode channels.

Contribution

It introduces a detailed analysis of classical and quantum communication over Unruh modes in accelerated frames, highlighting monogamy properties and optimal encoding strategies.

Findings

Coherent information exhibits monogamy constraints between inertial and accelerated observers.

Optimal parameters for Unruh modes differ from traditional choices in literature.

Quantum communication is fundamentally limited by acceleration-induced effects.

Abstract

We study communication between an inertial observer and one of two causally-disconnected counter accelerating observers. We will restrict the quantum channel considering inertial-to-accelerated bipartite classical and quantum communication over different sets of Unruh modes (single-rail or dual-rail encoding). We find that the coherent information (and therefore, the amount of entanglement that can be generated via state merging protocol) in this strongly restricted channel presents some interesting monogamy properties between the inertial and only one of the accelerated observers if we take a fixed choice of the Unruh mode used in the channel. The optimization of the controllable parameters is also studied and we find that they deviate from the values usually employed in the literature.