Entanglement harvesting of three Unruh-DeWitt detectors

Abstract

We analyze a tripartite entanglement harvesting protocol with three Unruh-DeWitt detectors adiabatically interacting with a quantum scalar field. We consider linear, equilateral triangular, and scalene triangular configurations for the detectors. We find that, under the same parameters, more entanglement can be extracted in the linear configuration than the equilateral one, consistent with single instantaneous switching results. No bipartite entanglement is required to harvest tripartite entanglement. Furthermore, we find that tripartite entanglement can be harvested even if one detector is at larger spacelike separations from the other two than in the corresponding bipartite case. We also find that for small detector separations bipartite correlations become larger than tripartite ones, leading to an apparent violation of the Coffman-Kundu-Wootters (CKW) inequality. We show that this is not a consequence of our perturbative expansion but that it instead occurs because the harvesting qubits are in a mixed state.

15 pages; 10 figures

References in corpus (23)

• Entanglement detection
• Monogamy Inequality in terms of Negativity for Three-Qubit States
• Entangling Power of an Expanding Universe
• Wavepacket detection with the Unruh-DeWitt model
• Relativistic Quantum Information in Detectors-Field Interactions
• Quantum Energy Teleportation in Spin Chain Systems
• Quantum Connectivity of Space-Time and Gravitationally Induced Decorrelation of Entanglement
• Entanglement harvesting for Unruh-DeWitt detectors in circular motion
• Harvesting large scale entanglement in de Sitter space with multiple detectors
• Non-perturbative analysis of entanglement harvesting from coherent field states
• Quantum imprints of gravitational shockwaves
• Why Does Gravity Ignore the Vacuum Energy?
• Harvesting mutual information from BTZ black hole spacetime
• Hot Cosmic Qubits: Late-Time de Sitter Evolution and Critical Slowing Down
• Extraction of genuine tripartite entanglement from the vacuum
• Particle detectors as witnesses for quantum gravity
• Over the horizon: distinguishing the Schwarzschild spacetime and the ${\mathbb{RP}}^3$ spacetime using an Unruh-DeWitt detector
• What does it mean for half of an empty cavity to be full?
• Ground and thermal states for the Klein-Gordon field on a massless hyperbolic black hole with applications to the anti-Hawking effect
• An angular momentum based graviton detector
• Measurement-based Multipartite Entanglement Inflation
• Multipartite Entanglement and Firewalls
• Quantum Detection of Conicity

Cited by in corpus (4)

• Harvesting entanglement from the gravitational vacuum
• The role of quantum degrees of freedom of relativistic fields in quantum information protocols
• How measuring a quantum field affects entanglement harvesting
• Non-perturbative simple-generated interactions with a quantum field for arbitrary Gaussian states