Convergence of fermionic field entanglement at infinite acceleration in relativistic quantum information

TL;DR

This paper demonstrates that in the infinite acceleration limit, fermionic field entanglement becomes mode-independent, challenging previous tensor product structures used in relativistic quantum information calculations.

Contribution

It shows that entanglement at infinite acceleration is mode-independent, revealing limitations of prior tensor product approaches in relativistic quantum information.

Findings

Entanglement becomes mode-independent at infinite acceleration.

Previous tensor product structures may not yield physical results.

Highlights fundamental limits in relativistic quantum information theory.

Abstract

We provide a simple argument showing that, in the limit of infinite acceleration, the entanglement in a fermionic field bipartite system must be independent of the choice of Unruh modes. This implies that most tensor product structures used previously to compute field entanglement in relativistic quantum information cannot give rise to physical results.