# Entanglement Degradation in Curved Spacetime: An Open Quantum Systems Approach

## TL;DR

This paper explores how gravitational effects influence quantum entanglement and coherence in space-based systems using advanced open quantum systems models, revealing asymmetries and potential revivals in entanglement.

## Contribution

It introduces a non-Markovian open quantum systems framework that incorporates gravitational redshift effects into decoherence processes, advancing understanding of relativistic quantum information.

## Key findings

- Gravitational redshift causes asymmetry in entanglement degradation.
- Structured environments can lead to entanglement revivals.
- Non-Markovian effects are significant in curved spacetime decoherence.

## Abstract

We investigate how gravitational time dilation affects the coherence and entanglement dynamics of spatially separated qubits using open quantum systems theory. Unlike earlier works that consider only static or Markovian noise models, our approach incorporates phase damping, amplitude damping, and thermal excitation, along with a non-Markovian extension. By embedding gravitational redshift into the local decoherence rates, we demonstrate asymmetry in entanglement degradation and reveal the possibility of revivals in structured environments. Our findings have implications for relativistic quantum communication and space-based quantum technologies.

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Source: https://tomesphere.com/paper/2508.21073