Entanglement and quantum teleportation under superposed gravitational fields

TL;DR

This paper explores how superposed gravitational fields affect quantum entanglement and teleportation, revealing conditions under which entanglement can be generated or suppressed, with potential observable consequences.

Contribution

It introduces a novel analysis of entanglement under superposed gravitational fields where the gravitational field cannot be separated unitarily, extending previous models.

Findings

Entanglement is suppressed when gravitational states are orthogonal.

Non-orthogonal gravitational states can generate entanglement depending on their overlap.

Gravitational effects influence quantum teleportation, potentially observable with macroscopic objects.

Abstract

The influence of gravitational field on entanglement of bipartite states is investigated based on the recent idea of superposition states of gravitational field. Different from earlier considerations, we study the case where the gravitational field cannot be separated unitarily from the bipartite system in the final stage of the interaction. When the different gravitational field states are orthogonal, entanglement cannot be generated for an initial product state. If the different gravitational field states are non-orthogonal, entanglement can be generated and the amount of generated entanglement depends on an overlap parameter between different gravitational field states. The influence of gravitational field on the transfer of the state through quantum teleportation is also studied, which might lead to an observable effect since the quantum teleportation can be performed using macroscopic object.