Can the latent signatures of quantum superposition be detected through correlation harvesting?

• URL: http://arxiv.org/abs/2508.00292v1
• Date: Fri, 01 Aug 2025 03:30:17 GMT
• Title: Can the latent signatures of quantum superposition be detected through correlation harvesting?
• Authors: Yu Tang, Wentao Liu, Zhilong Liu, Jieci Wang,
• Abstract summary: In this paper, we explore correlation harvesting in quantum superposition.<n>We focus on entanglement and mutual information extracted by two Unruh-DeWitt detectors interacting with a quantum field in a mass-superposed BTZ black hole spacetime.<n>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.
• Score: 6.436894566612185
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• 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 interference effects 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.

Related papers

• Quantifying Quantumness in (A)dS spacetimes with Unruh-DeWitt Detector [4.378051693716982]
  This work focuses on the theoretical feasibility of probing quantum properties in de Sitter (dS) and Anti-de Sitter (AdS) spacetimes via detectors.<n>By employing the Unruh-DeWitt detector coupled with a massless scalar field, quantum uncertainty and quantum coherence in both dS and AdS spacetimes are investigated.
  arXiv  Detail & Related papers  (2025-02-11T01:23:57Z)
• Entanglement harvesting in quantum superposed spacetime [0.10686401485328585]
  We investigate the phenomenon of entanglement harvesting for a spacetime in quantum superposition.<n>We find that the superposed nature of spacetime induces interference effects that can significantly enhance entanglement for both twisted and untwisted field.
  arXiv  Detail & Related papers  (2024-12-20T13:18:22Z)
• Search for New Particles with Flying Quantum Sensors in Space [15.476792647624473]
  We propose the implementation of space-based quantum sensing to explore ultralight new particles beyond the standard model.<n>The central idea involves probing long-range interactions between spin ensembles of space quantum sensors and the particles residing within Earth.<n>Our projected search sensitivity can surpass the sensitivities of both terrestrial experiments and proposals by up to approximately 7 orders of magnitude.
  arXiv  Detail & Related papers  (2024-10-21T08:15:29Z)
• Quantum superpositions of Minkowski spacetime [0.0]
  "Spacetime superpositions" are quantum superpositions of different spacetimes not related by a global coordinate transformation. We consider the quantum-gravitational effects produced by superpositions of periodically identified Minkowski spacetime. We show that the detector's response exhibits discontinuous resonances at rational ratios of the superposed periodic length scale.
  arXiv  Detail & Related papers  (2022-08-25T13:31:05Z)
• Quantum time dilation in a gravitational field [39.58317527488534]
  We investigate how the superposition principle affects the gravitational time dilation observed by a simple clock. We show that the emission rate of an atom prepared in a coherent superposition of separated wave packets in a gravitational field is different from the emission rate of an atom in a classical mixture of these packets.
  arXiv  Detail & Related papers  (2022-04-22T10:02:21Z)
• Entanglement Harvesting with a Twist [0.0]
  We investigate entanglement outside of an $mathbbRP$ geon by considering the entanglement structure of the vacuum state of a quantum field in this spacetime. We find that detectors with a small energy gap harvest more entanglement in the BTZ spacetime. As the energy gap increases, the detectors harvest more entanglement in a geon spacetime.
  arXiv  Detail & Related papers  (2022-01-26T19:00:00Z)
• Spacetime effects on wavepackets of coherent light [24.587462517914865]
  We introduce an operational way to distinguish between the overall shift in the pulse wavepacket and its genuine deformation after propagation. We then apply our technique to quantum states of photons that are coherent in the frequency degree of freedom. We find that the quantum coherence initially present can enhance the deformation induced by propagation in a curved background.
  arXiv  Detail & Related papers  (2021-06-23T14:20:19Z)
• Gravitational waves affect vacuum entanglement [68.8204255655161]
  The entanglement harvesting protocol is an operational way to probe vacuum entanglement. Using this protocol, it is demonstrated that while the transition probability of an individual atom is unaffected by the presence of a gravitational wave, the entanglement harvested by two atoms depends sensitively on the frequency of the gravitational wave. This suggests that the entanglement signature left by a gravitational wave may be useful in characterizing its properties, and potentially useful in exploring the gravitational-wave memory effect and gravitational-wave induced decoherence.
  arXiv  Detail & Related papers  (2020-06-19T18:01:04Z)
• Quantum Temporal Superposition: the case of QFT [0.0]
  We consider what happens when a quantum-controlled superposition of detectors at different space-time points is used to probe the correlations of the field. We show that, due to quantum interference effects, two detectors can gain information on field correlations which would not be otherwise accessible.
  arXiv  Detail & Related papers  (2020-02-14T19:00:00Z)
• Atom-interferometric test of the universality of gravitational redshift and free fall [48.82541018696971]
  Light-pulse atom interferometers constitute powerful quantum sensors for inertial forces. We present a specific geometry which together with state transitions leads to a scheme that is sensitive to both violations of the universality of free fall and gravitational redshift.
  arXiv  Detail & Related papers  (2020-01-27T13:35:30Z)
• Interference of Clocks: A Quantum Twin Paradox [39.645665748998816]
  Phase of matter waves depends on proper time and is susceptible to special-relativistic (kinematic) and gravitational (redshift) time dilation. It is conceivable that atom interferometers measure general-relativistic time-dilation effects. We show that closed light-pulse interferometers without clock transitions during the pulse sequence are not sensitive to gravitational time dilation in a linear potential.
  arXiv  Detail & Related papers  (2019-05-22T12:30:57Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.