Harvesting entanglement from the gravitational vacuum

Abstract

We study how quantum systems can harvest entanglement from the quantum degrees of freedom of the gravitational field. Concretely, we describe in detail the interaction of non-relativistic quantum systems with linearized quantum gravity, and explore how two spacelike separated probes can harvest entanglement from the gravitational field in this context. We provide estimates for the harvested entanglement for realistic probes which can be experimentally relevant in the future, since entanglement harvesting experiments can provide evidence for the existence of quantum degrees of freedom of gravity.

arXiv comment18 pages + appendices, 16 figures, revTex 4.2. V2: updated to match published version

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• Closed-form expressions for smeared bi-distributions of a massless scalar field: non-perturbative and asymptotic results in relativistic quantum information
• Interference of communication and field correlations in entanglement harvesting
• Making two particle detectors in flat spacetime communicate quantumly
• Entanglement and correlations between local observables in de Sitter spacetime
• Harvesting Contextuality from the Vacuum
• A relativistic QFT description for the interaction of a spin with a magnetic field
• Harvesting entanglement from the Lorentz-violating quantum field vacuum in a dipolar Bose-Einstein condensate
• Harvesting entanglement from the cylindrical gravitational wave spacetime
• Harvesting stabilizer entropy and non-locality from a quantum field
• Cosmological Expansion Induces Interference Between Communication and Entanglement Harvesting
• When does entanglement through gravity imply gravitons?