Quantum entanglement in three accelerating qubits coupled to scalar field

TL;DR

This paper investigates how quantum entanglement among three accelerating qubits, each coupled to a scalar field, degrades with increasing acceleration, showing that entanglement can abruptly vanish at high accelerations, especially near black hole horizons.

Contribution

It analyzes the dynamics of three-partite entanglement for GHZ and W states under acceleration, revealing conditions for sudden death of entanglement in relativistic settings.

Findings

Entanglement diminishes with increasing acceleration.

All entanglement types suddenly vanish at high accelerations.

Near black hole horizons, entanglement eventually disappears.

Abstract

We consider quantum entanglement of three accelerating qubits, each of which is locally coupled with a real scalar field, without causal influence among the qubits or among the fields. The initial states are assumed to be the GHZ and W states, which are the two representative three-partite entangled states. For each initial state, we study how various kinds of entanglement depend on the accelerations of the three qubits. All kinds of entanglement eventually suddenly die if at least two of three qubits have large enough accelerations. This result implies the eventual sudden death of all kinds of entanglement among three particles coupled with scalar fields when they are sufficiently close to the horizon of a black hole.