Matter-Field Exchange Generates Entanglement, Not Classical Gravity

• URL: http://arxiv.org/abs/2607.03429v1
• Date: Fri, 03 Jul 2026 15:41:20 GMT
• Title: Matter-Field Exchange Generates Entanglement, Not Classical Gravity
• Abstract summary: We show that the Aziz-Howl mechanism is a matter-sector cross-talk effect in a classical background.<n>We argue that the Aziz-Howl mechanism is a matter-sector cross-talk effect in a classical background.
• Score: 0.0
• License: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Abstract: Aziz and Howl have argued that a hybrid theory with quantum matter and a classical gravitational field can generate entanglement between two massive systems. In their construction, the branch-dependent contribution appears at fourth order through propagators of the quantum matter field in a fixed classical gravitational potential. We analyse this mechanism within the same perturbative QFT framework and show that the effect should not be interpreted as classical gravity mediating entanglement in the sense relevant to BMV-type witnesses. The non-separable term relies on a quantum-matter exchange channel between the two interferometers and is present only when the two systems are modelled as excitations of the same matter field. If distinct, non-interconverting matter fields describe the systems, the corresponding cross-propagator is absent and the Aziz-Howl entangling diagram vanishes. The effect relies on coherent propagation amplitudes of the quantum matter field between the two interferometers, together with postselection onto the original localised branch subspace. Moreover, the inference of entanglement is made after projecting the full QFT evolution onto a restricted final subspace containing the original localised $N$-particle branch states. This projection removes precisely the sectors that would record matter-field contamination, mode deformation, or exchange between the two interferometers. We therefore argue that the Aziz-Howl mechanism is a matter-sector cross-talk effect in a classical background, not entanglement mediated by classical gravitational degrees of freedom. Having identified the channel responsible for the Aziz-Howl contribution, we predict that it can be eliminated by using distinct, non-interconverting matter species in the two interferometers, or by inserting a barrier that suppresses matter-field propagation between them.

Related papers

• Bell nonlocality from twisted statistics [39.146761527401424]
  We investigate Bell correlations for a free real quantum scalar field on the noncommutative Moyal plane.<n>We show that suitable local mode measurements lead to a violation of the CHSH Bell inequality.
  arXiv  Detail & Related papers  (2026-08-06T17:55:50Z)
• Entanglement-spectrum fingerprint of a non-invertible symmetry: the Kramers--Wannier duality defect on the lattice [11.171049368197778]
  Non-invertible symmetries are characterized by topological defects of irrational quantum dimension.<n>We show that the categorical data of the canonical example -- the Kramers--Wannier (KW) duality defect of the critical Ising chain -- is encoded in the single-particle entanglement spectrum of its ground state.
  arXiv  Detail & Related papers  (2026-07-01T16:21:58Z)
• Matter-Mediated Entanglement in Classical Gravity: Suppression by Binding Potentials and Localization [4.4857806924732815]
  Two spatially separated masses can become entangled even when gravity is treated as a classical field.<n>We point out that the relevant mechanism is not intrinsically field-theoretic, but is essentially a quantum tunneling/evanescent matter channel.
  arXiv  Detail & Related papers  (2025-12-15T18:58:13Z)
• Comment on Classical-Gravity--Quantum-Matter Claims About Gravity-Mediated Entanglement [0.0]
  A recent paper by Aziz and Howl argues that, once quantum matter is described at the level of quantum field theory and coupled to a classical gravitational field, higher order processes can generate entanglement between two spatially separated masses.<n>A contemporaneous critical note shows that, in the actual nonrelativistic limit employed there, the interaction becomes ultra local, the total unitary factorizes, and no entanglement is generated from a product input.
  arXiv  Detail & Related papers  (2025-11-25T05:14:33Z)
• Wormhole-Induced correlation: A Link Between Two Universes [9.24403207283966]
  Motivated by the profound connection between quantum mechanics and spacetime geometry, this study aims to investigate the influence of wormhole geometries on quantum information extraction.<n>We examine the correlation-specifically mutual information (MI) and entanglement-extracted by two Unruh-DeWitt (UDW) detectors from the quantum vacuum field in the presence of a BTZ wormhole featuring a null-like throat.<n>Our results indicate that the wormhole enhances MI extraction, with maximal MI achieved when the detectors are located at specific image-symmetric points connected by the wormhole.
  arXiv  Detail & Related papers  (2025-10-05T02:49:53Z)
• Entangled Unruh-DeWitt detectors amplify quantum coherence [10.476470705835427]
  We explore the quantum coherence between a pair of entangled Unruh-DeWitt detectors, interacting with a quantum field, using a nonperturbative approach.<n>For a maximally entangled state, increasing the coupling strength enhances the detectors' initial quantum coherence while simultaneously causing a monotonic decrease in their initial entanglement.<n>This reveals a remarkable phenomenon: through nonperturbative interactions, entangled Unruh-DeWitt detectors can exhibit a dual effect-amplifying quantum coherence while degrading quantum entanglement.
  arXiv  Detail & Related papers  (2025-06-17T02:16:36Z)
• Theory of the correlated quantum Zeno effect in a monitored qubit dimer [41.94295877935867]
  We show how the competition between two measurement processes give rise to two distinct Quantum Zeno (QZ) regimes.<n>We develop a theory based on a Gutzwiller ansatz for the wavefunction that is able to capture the structure of the Hilbert phase diagram.<n>We show how the two QZ regimes are intimately connected to the topology of the flow of the underlying non-Hermitian Hamiltonian governing the no-click evolution.
  arXiv  Detail & Related papers  (2025-03-28T19:44:48Z)
• Stable excitations and holographic transportation in tensor networks of critical spin chains [9.397121474087331]
  We find that hologrons are unstable during dynamic evolution.<n>In searching for stable bulk excitations with attractive interactions, we find they can be constructed by the local primary operators in the boundary CFT.
  arXiv  Detail & Related papers  (2025-01-06T15:27:19Z)
• Pancharatnam phase as an entanglement witness for quantum gravity in dual Stern-Gerlach interferometers [0.0]
  Entanglement plays a central role in the fundamental tests and practical applications of quantum mechanics.<n>I study the dual spin-one-half Stern-Gerlach interferometers and show that the Pancharatnam phase is a tool that distinguishes semiclassical from quantum gravity.
  arXiv  Detail & Related papers  (2024-09-29T12:48:44Z)
• Phonon-induced contrast in a matter-wave interferometer [0.7874708385247352]
  We study the issue of internal degrees of freedom, specifically phonon fluctuations and contrast reduction. This work will investigate the contrast reduction caused by spin-magnetic field and diamagnetic interactions at the phonon occupation level.
  arXiv  Detail & Related papers  (2024-04-05T16:42:11Z)
• Entanglement-interference complementarity and experimental demonstration in a superconducting circuit [13.591959156678946]
  Quantum entanglement between an interfering particle and a detector for acquiring the which-path information plays a central role for enforcing Bohr's complementarity principle. Here we find an equality for quantifying the relation between this entanglement and the fringe visibility. We experimentally demonstrate this relation with a superconducting circuit, where a resonator serves as a which-path detector for an interfering qubit.
  arXiv  Detail & Related papers  (2022-03-13T02:49:11Z)
• Quantum asymmetry and noisy multi-mode interferometry [55.41644538483948]
  Quantum asymmetry is a physical resource which coincides with the amount of coherence between the eigenspaces of a generator. We show that the asymmetry may emphincrease as a result of a emphdecrease of coherence inside a degenerate subspace.
  arXiv  Detail & Related papers  (2021-07-23T07:30:57Z)
• Observation-dependent suppression and enhancement of two-photon coincidences by tailored losses [68.8204255655161]
  Hong-Ou-Mandel (HOM) effect can lead to a perfect suppression of two-particle coincidences between the output ports of a balanced beam splitter. In this work, we demonstrate experimentally that the two-particle coincidence statistics of two bosons can instead be seamlessly tuned to substantial enhancement. Our findings reveal a new approach to harnessing non-Hermitian settings for the manipulation of multi-particle quantum states.
  arXiv  Detail & Related papers  (2021-05-12T06:47:35Z)

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.