Can the latent signatures of quantum superposition be detected through correlation harvesting?
arXiv:2508.00292 · doi:10.1007/JHEP01(2026)045
Abstract
In this paper, we explore correlation harvesting in quantum superposition, specifically focusing on the entanglement and mutual information extracted by two Unruh-DeWitt detectors interacting with a quantum field in a mass-superposed BTZ black hole spacetime. Our findings reveal that the superposed nature of spacetime induces constructive interference between the field modes that can significantly enhance the entanglement harvesting relative to a single spacetime background. In contrast to entanglement, the mutual information obtained in spacetime superposition is influenced by the proper distance between the two detectors. While the mutual information harvested in a superposed spacetime remains lower than that in a single spacetime when the proper distance between detectors is small, it exceeds that in a single spacetime for specific mass ratios as the distance increases. Notably, we find that both entanglement and mutual information harvesting reach their maxima when the final spacetime superposition state is conditioned to align with the initial spacetime state.
13 pages, 14 figures
References in corpus (35)
- Entangling Power of an Expanding Universe
- Quantum Oppenheimer-Snyder and Swiss Cheese models
- Light rings and shadows of static black holes in effective quantum gravity
- Genuine tripartite nonlocality and entanglement in curved spacetime
- Quantum superposition of spacetimes obeys Einstein's Equivalence Principle
- Harvesting Entanglement with Detectors Freely Falling into a Black Hole
- Harvesting correlations in Schwarzschild and collapsing shell spacetimes
- Spacetime Quantum Reference Frames and superpositions of proper times
- Lorentz violation alleviates gravitationally induced entanglement degradation
- Quantum Temporal Superposition: the case of QFT
- Effects of Horizons on Entanglement Harvesting
- Unruh-deWitt detectors in quantum superpositions of trajectories
- Entanglement harvesting for Unruh-DeWitt detectors in circular motion
- Black Holes and Covariance in Effective Quantum Gravity
- Harvesting large scale entanglement in de Sitter space with multiple detectors
- Quantum signatures of black hole mass superpositions
- Gravitational waves affect vacuum entanglement
- Harvesting correlations from BTZ black hole coupled to a Lorentz-violating vector field
- Would quantum coherence be increased by curvature effect in de Sitter space?
- Replacing the Notion of Spacetime Distance by the Notion of Correlation
- Entanglement dynamics for Unruh-DeWitt detectors interacting with massive scalar fields: The Unruh and anti-Unruh effects
- Entanglement harvesting in cosmic string spacetime
- Entanglement Harvesting with a Twist
- Light rings and shadows of static black holes in effective quantum gravity II: A new solution without Cauchy horizons
- Observational signature of Lorentz violation in acceleration radiation
- Entanglement harvesting of accelerated detectors versus static ones in a thermal bath
- Optimal quantum strategy for locating Unruh channels
- Harvesting correlations from vacuum quantum fields in the presence of a reflecting boundary
- Black holes and covariance in effective quantum gravity: A solution without Cauchy horizons
- Does acceleration always degrade quantum entanglement for tetrapartite Unruh-DeWitt detectors?
- Entanglement harvesting in quantum superposed spacetime
- How measuring a quantum field affects entanglement harvesting
- Generation of quantum entanglement in superposed diamond spacetime
- Mutual information harvested by uniformly accelerated particle detectors
- Quantum correlation and origin of Hawking radiation for mass-superposed BTZ black holes
Cited by in corpus (6)
- Multiqubit coherence of mixed states near event horizon
- Does relativistic motion really freeze initially maximal entanglement?
- Probing Spacetime Topology and Superposition with Accelerated Detectors
- Non-monotonic evolution of multipartite entanglement under the Unruh effect
- Bosonic and fermionic mutual information of N-partite systems in dilaton black hole background
- Velocity effects slightly mitigating the quantumness degradation of an Unruh-DeWitt detector