Classical theories of gravity produce entanglement

• URL: http://arxiv.org/abs/2510.19714v2
• Date: Mon, 27 Oct 2025 11:12:50 GMT
• Title: Classical theories of gravity produce entanglement
• Authors: Joseph Aziz, Richard Howl,
• Abstract summary: In modern versions of the experiment, if the two objects subsequently become entangled, this is considered unambiguous evidence that gravity obeys the laws of quantum mechanics.<n>Here, we argue that the classical gravitational interaction can transmit quantum information, and thus generate entanglement through physically local processes.<n>The effects are found to scale differently to the considered quantum gravity effect, providing information on the form of the experiment required to evidence the quantum nature of gravity.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: The unification of gravity and quantum mechanics remains one of the most profound open questions in science. With recent advances in quantum technology, an experimental idea first proposed by Richard Feynman is now regarded as a promising route to testing this unification for the first time. The experiment involves placing a massive object in a quantum superposition of two locations and letting it gravitationally interact with another mass. In modern versions of the experiment, if the two objects subsequently become entangled, this is considered unambiguous evidence that gravity obeys the laws of quantum mechanics. This conclusion derives from theorems that treat a classical gravitational interaction as a local interaction capable of only transmitting classical, not quantum, information. Here, we argue that the classical gravitational interaction can transmit quantum information, and thus generate entanglement through physically local processes. The effects are found to scale differently to the considered quantum gravity effect, providing information on the form of the experiment required to evidence the quantum nature of gravity.

Related papers

• Experiment to test the incompleteness of quantum mechanics [45.88028371034407]
  We propose an experiment to test the incompleteness of the standard quantum formalism.<n>We show with simulations that the transmission densities in the standard interpretation and in the double solution interpretation give very different results.
  arXiv  Detail & Related papers  (2025-09-05T08:02:14Z)
• Today's Experiments Suffice to Verify the Quantum Essence of Gravity [0.0]
  We argue that current matter-wave interferometers are sufficient to indirectly prove that gravitational interaction creates entanglement between two systems.<n>Our findings indicate that the experimental verification of the quantum essence of gravity is on the horizon.
  arXiv  Detail & Related papers  (2025-08-05T03:56:01Z)
• Detectability of post-Newtonian classical and quantum gravity via quantum clock interferometry [9.13755431537592]
  We propose and theoretically analyze an experimental scheme to investigate how post-Newtonian gravity affects quantum systems.<n>We consider two setups: (i) a quantum clock interferometry setup designed to detect the gravitational field of a rotating mass, and (ii) a scheme exploring whether such effects could be used to generate gravity-induced entanglement.
  arXiv  Detail & Related papers  (2025-06-17T23:03:22Z)
• Observation of Quantum Darwinism and the Origin of Classicality with Superconducting Circuits [9.09683951826704]
  How can we rationalize everyday classical observations from an inherently quantum world?<n>Quantum Darwinism offers a compelling framework to explain this emergence of classicality.<n>We observe the highly structured branching quantum states that support classicality and the saturation of quantum mutual information.
  arXiv  Detail & Related papers  (2025-04-01T13:33:32Z)
• Semiclassical gravity phenomenology under the causal-conditional quantum measurement prescription II: Heisenberg picture and apparent optical entanglement [13.04737397490371]
  In quantum gravity theory, a state-dependent gravitational potential introduces nonlinearity into the state evolution. The formalism for understanding the continuous quantum measurement process on the quantum state has been previously discussed using the Schr"odinger picture. In this work, an equivalent formalism using the Heisenberg picture is developed and applied to the analysis of two optomechanical experiment protocols.
  arXiv  Detail & Related papers  (2024-11-08T14:07:18Z)
• Table-top nanodiamond interferometer enabling quantum gravity tests [34.82692226532414]
  We present a feasibility study for a table-top nanodiamond-based interferometer. By relying on quantum superpositions of steady massive objects our interferometer may allow exploiting just small-range electromagnetic fields.
  arXiv  Detail & Related papers  (2024-05-31T17:20:59Z)
• Entanglement Dynamics in Quantum Continuous-Variable States [2.480301925841752]
  Gravitation between two quantum masses is one of the most straightforward scenarios where quantum features of gravity could be observed. This thesis introduces general tools to tackle interaction-mediated entanglement and applies them to two particles prepared in continuous-variable states.
  arXiv  Detail & Related papers  (2024-05-12T19:21:21Z)
• A computational test of quantum contextuality, and even simpler proofs of quantumness [43.25018099464869]
  We show that an arbitrary contextuality game can be compiled into an operational "test of contextuality" involving a single quantum device. Our work can be seen as using cryptography to enforce spatial separation within subsystems of a single quantum device.
  arXiv  Detail & Related papers  (2024-05-10T19:30:23Z)
• Quantum effects in gravity beyond the Newton potential from a delocalised quantum source [0.9405321764712891]
  We show for the first time that gravity is not compatible with a classical description. Experiments such as the generation of gravitationally induced entanglement between two quantum sources of gravity can be explained with the Newton potential.
  arXiv  Detail & Related papers  (2024-02-15T19:33:04Z)
• Testing Quantum Gravity using Pulsed Optomechanical Systems [13.650870855008112]
  We consider the Schr"odinger-Newton (SN) theory and the Correlated Worldline (CWL) theory, and show that they can be distinguished from conventional quantum mechanics. We find that discriminating between the theories will be very difficult until experimental control over low frequency quantum optomechanical systems is pushed further.
  arXiv  Detail & Related papers  (2023-11-03T17:06:57Z)
• Detecting Gravitationally Interacting Dark Matter with Quantum Interference [47.03992469282679]
  We show that there is a theoretical possibility to directly detect such particles using highly sensitive gravity-mediated quantum phase shifts. In particular, we consider a protocol utilizing Josephson junctions.
  arXiv  Detail & Related papers  (2023-09-15T08:22:46Z)
• Decoherence of a composite particle induced by a weak quantized gravitational field [0.0]
  We study the decoherence of a quantum system induced by the quantized gravitational field and by its own quantum nature. Our results may be important in providing a better understanding of many phenomena like the decoherence induced by the gravitational time-dilation.
  arXiv  Detail & Related papers  (2023-08-14T20:49:16Z)
• Testing the nonclassicality of gravity with the field of a single delocalized mass [55.2480439325792]
  A setup is proposed that is based on a single delocalized mass coupled to a harmonically trapped test mass. We investigate the in-principle feasibility of such an experiment, which turns out to crucially depend on the ability to tame Casimir-Polder forces.
  arXiv  Detail & Related papers  (2023-07-18T15:40:16Z)
• Inference of gravitational field superposition from quantum measurements [1.7246954941200043]
  In non-relativistic quantum mechanics, the gravitational field in such experiments can be written as a superposition state. We empirically demonstrate that alternative theories of gravity can avoid gravitational superposition states. Proposed experiments with superposed gravitational sources would provide even stronger evidence that gravity is nonclassical.
  arXiv  Detail & Related papers  (2022-09-06T04:37:07Z)
• Semi-classical gravity phenomenology under the causal-conditional quantum measurement prescription [9.842140146649346]
  We study experimentally measurable signatures of SN theory under the causal-conditional prescription in an optomechanical system. We find that quantum measurement can induce a classical correlation between two different optical fields via classical gravity.
  arXiv  Detail & Related papers  (2022-07-13T05:09:55Z)
• Operational Resource Theory of Imaginarity [48.7576911714538]
  We show that quantum states are easier to create and manipulate if they only have real elements. As an application, we show that imaginarity plays a crucial role for state discrimination.
  arXiv  Detail & Related papers  (2020-07-29T14:03:38Z)

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.