Testing whether gravity acts as a quantum entity when measured
Testing whether gravity acts as a quantum entity when measured
A defining signature of classical systems is “in principle measurability” without disturbance: a feature manifestly violated by quantum systems. We describe a multi-interferometer experimental setup that can, in principle, reveal the nonclassicality of a spatial superposition-sourced gravitational field if an irreducible disturbance is caused by a measurement of gravity. While one interferometer sources the field, the others are used to measure the gravitational field created by the superposition. This requires neither any specific form of nonclassical gravity, nor the generation of entanglement between any relevant degrees of freedom at any stage, thus distinguishing it from the experiments proposed so far. This test, when added to the recent entanglement-witness based proposals, enlarges the domain of quantum postulates being tested for gravity. Moreover, the proposed test yields a signature of quantum measurement induced disturbance for any finite rate of decoherence, and is device independent.
Hanif, Farhan
d352a37f-2435-49c5-b7e2-6fdf1a5237fe
Das, Debarshi
e07855b6-f9c3-4a42-9380-6329da1b626c
Halliwell, Jonathan
794a573b-1246-4be7-b25b-97c440de0f8a
Home, Dipankar
55e97163-d1b1-46d5-b389-d789065a9f45
Mazumdar, Anupam
46c594c7-c9cb-436a-9b4e-e067f13dfa01
Ulbricht, Hendrik
5060dd43-2dc1-47f8-9339-c1a26719527d
Bose, Sougato
3cfeed0c-a124-4f9c-8f2e-898a6b5d3dde
29 October 2024
Hanif, Farhan
d352a37f-2435-49c5-b7e2-6fdf1a5237fe
Das, Debarshi
e07855b6-f9c3-4a42-9380-6329da1b626c
Halliwell, Jonathan
794a573b-1246-4be7-b25b-97c440de0f8a
Home, Dipankar
55e97163-d1b1-46d5-b389-d789065a9f45
Mazumdar, Anupam
46c594c7-c9cb-436a-9b4e-e067f13dfa01
Ulbricht, Hendrik
5060dd43-2dc1-47f8-9339-c1a26719527d
Bose, Sougato
3cfeed0c-a124-4f9c-8f2e-898a6b5d3dde
Hanif, Farhan, Das, Debarshi, Halliwell, Jonathan, Home, Dipankar, Mazumdar, Anupam, Ulbricht, Hendrik and Bose, Sougato
(2024)
Testing whether gravity acts as a quantum entity when measured.
Phys. Rev. Lett., 133, [180201].
(doi:10.1103/PhysRevLett.133.180201).
Abstract
A defining signature of classical systems is “in principle measurability” without disturbance: a feature manifestly violated by quantum systems. We describe a multi-interferometer experimental setup that can, in principle, reveal the nonclassicality of a spatial superposition-sourced gravitational field if an irreducible disturbance is caused by a measurement of gravity. While one interferometer sources the field, the others are used to measure the gravitational field created by the superposition. This requires neither any specific form of nonclassical gravity, nor the generation of entanglement between any relevant degrees of freedom at any stage, thus distinguishing it from the experiments proposed so far. This test, when added to the recent entanglement-witness based proposals, enlarges the domain of quantum postulates being tested for gravity. Moreover, the proposed test yields a signature of quantum measurement induced disturbance for any finite rate of decoherence, and is device independent.
Text
PhysRevLett.133.180201
- Version of Record
More information
Accepted/In Press date: 11 September 2024
Published date: 29 October 2024
Identifiers
Local EPrints ID: 497740
URI: http://eprints.soton.ac.uk/id/eprint/497740
ISSN: 1079-7114
PURE UUID: 7e646106-b757-4c2c-8e8c-ecf9f575b19e
Catalogue record
Date deposited: 30 Jan 2025 17:46
Last modified: 22 Aug 2025 01:59
Export record
Altmetrics
Contributors
Author:
Farhan Hanif
Author:
Debarshi Das
Author:
Jonathan Halliwell
Author:
Dipankar Home
Author:
Anupam Mazumdar
Author:
Sougato Bose
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics
