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.
arXiv comment13 pages, 14 figures
References in corpus (61)
- Entanglement of Formation of an Arbitrary State of Two Qubits
- Large N Field Theories, String Theory and Gravity
- The Black Hole in Three Dimensional Space Time
- Introducing Quantum Discord
- Entanglement of a Pair of Quantum Bits
- Classical, quantum and total correlations
- Geometry of the 2+1 Black Hole
- Super-Poincare Covariant Quantization of the Superstring
- Alice falls into a black hole: Entanglement in non-inertial frames
- Entanglement from the vacuum
- Violating Bell's inequalities in the vacuum
- Quantum Superposition of Massive Objects and the Quantization of Gravity
- Entangling Power of an Expanding Universe
- Harvesting correlations from the quantum vacuum
- The causal set approach to quantum gravity
- Acceleration-assisted entanglement harvesting and rangefinding
- On the possibility of laboratory evidence for quantum superposition of geometries
- Quantum Oppenheimer-Snyder and Swiss Cheese models
- Spacetime structure and vacuum entanglement
- Scalar field quantization on the 2+1 dimensional black hole background
- Bell's Theorem for Temporal Order
- Harvesting Entanglement from the Black Hole Vacuum
- Light rings and shadows of static black holes in effective quantum gravity
- Quantum clocks observe classical and quantum time dilation
- Genuine tripartite nonlocality and entanglement in curved spacetime
- General Relativistic Quantum Optics: Finite-size particle detector models in curved spacetimes
- Quantum superposition of spacetimes obeys Einstein's Equivalence Principle
- Harvesting Entanglement with Detectors Freely Falling into a Black Hole
- Entangling detectors in anti-de Sitter space
- Harvesting correlations in Schwarzschild and collapsing shell spacetimes
- Relativistic Quantum Optics: On the relativistic invariance of the light-matter interaction models
- Spacetime Quantum Reference Frames and superpositions of proper times
- Unruh-DeWitt detectors and entanglement: the anti-de Sitter space
- 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
- The black hole final state for the Dirac fields In Schwarzschild spacetime
- Harvesting large scale entanglement in de Sitter space with multiple detectors
- Quantum signatures of black hole mass superpositions
- Gravitational waves affect vacuum entanglement
- Would quantum coherence be increased by curvature effect in de Sitter space?
- Harvesting correlations from BTZ black hole coupled to a Lorentz-violating vector field
- 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 with a Twist
- Entanglement harvesting in cosmic string spacetime
- 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
- Harvesting correlations from vacuum quantum fields in the presence of a reflecting boundary
- Optimal quantum strategy for locating Unruh channels
- 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
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- 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