Coherence and Entanglement in a Non-commutative Spacetime

TL;DR

This paper explores how quantum spacetime deformations can generate and sustain quantum coherence and entanglement in a two-particle system, despite environmental decoherence effects.

Contribution

It introduces a model where spacetime deformation induces momentum-dependent interactions that promote quantum correlations, a novel mechanism in quantum spacetime studies.

Findings

Deformation-induced interactions counteract decoherence effects.

Quantum correlations can be created and maintained in open quantum spacetime.

Entanglement degrades over time but correlations can still be preserved.

Abstract

We investigate the emergence of quantum coherence and quantum correlations in a two-particle system with deformed symmetries arising from the quantum nature of spacetime. We demonstrate that the deformation of energy-momentum composition induces a momentum-dependent interaction that counteracts the decoherence effects described by the Lindblad equation in quantum spacetime. This interplay leads to the formation of coherence, entanglement and other correlations, which we quantify using concurrence, the $l_1$-norm of coherence, quantum mutual information and Local Quantum Fisher Information. Our analysis reveals that while the openness of quantum spacetime ultimately degrades entanglement, it also facilitates the creation and preservation of both classical and quantum correlations.