Mass-independent scheme to test the quantumness of a massive object
Mass-independent scheme to test the quantumness of a massive object
The search for empirical schemes to evidence the nonclassicality of large masses is a central quest of current research. However, practical schemes to witness the irreducible quantumness of an arbitrarily large mass are still lacking. To this end, we incorporate crucial modifications to the standard tools for probing the quantum violation of the pivotal classical notion of macrorealism (MR): while usual tests use the same measurement arrangement at successive times, here we use two different measurement arrangements. This yields a striking result: a mass-independent violation of MR is possible for harmonic oscillator systems. In fact, our adaptation enables probing quantum violations for literally any mass, momentum, and frequency. Moreover, coarse-grained position measurements at an accuracy much worse than the standard quantum limit, as well as knowing the relevant parameters only to this precision, without requiring them to be tuned, suffice for our proposal. These should drastically simplify the experimental effort in testing the nonclassicality of massive objects ranging from atomic ions to macroscopic mirrors in LIGO.
Das, Debarshi
e07855b6-f9c3-4a42-9380-6329da1b626c
Home, Dipankar
55e97163-d1b1-46d5-b389-d789065a9f45
Ulbricht, Hendrik
5060dd43-2dc1-47f8-9339-c1a26719527d
Bose, Sougato
3cfeed0c-a124-4f9c-8f2e-898a6b5d3dde
16 January 2024
Das, Debarshi
e07855b6-f9c3-4a42-9380-6329da1b626c
Home, Dipankar
55e97163-d1b1-46d5-b389-d789065a9f45
Ulbricht, Hendrik
5060dd43-2dc1-47f8-9339-c1a26719527d
Bose, Sougato
3cfeed0c-a124-4f9c-8f2e-898a6b5d3dde
Das, Debarshi, Home, Dipankar, Ulbricht, Hendrik and Bose, Sougato
(2024)
Mass-independent scheme to test the quantumness of a massive object.
Phys. Rev. Lett., 132, [030202].
(doi:10.1103/PhysRevLett.132.030202).
Abstract
The search for empirical schemes to evidence the nonclassicality of large masses is a central quest of current research. However, practical schemes to witness the irreducible quantumness of an arbitrarily large mass are still lacking. To this end, we incorporate crucial modifications to the standard tools for probing the quantum violation of the pivotal classical notion of macrorealism (MR): while usual tests use the same measurement arrangement at successive times, here we use two different measurement arrangements. This yields a striking result: a mass-independent violation of MR is possible for harmonic oscillator systems. In fact, our adaptation enables probing quantum violations for literally any mass, momentum, and frequency. Moreover, coarse-grained position measurements at an accuracy much worse than the standard quantum limit, as well as knowing the relevant parameters only to this precision, without requiring them to be tuned, suffice for our proposal. These should drastically simplify the experimental effort in testing the nonclassicality of massive objects ranging from atomic ions to macroscopic mirrors in LIGO.
Text
PhysRevLett.132.030202
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Accepted/In Press date: 30 November 2023
Published date: 16 January 2024
Identifiers
Local EPrints ID: 497733
URI: http://eprints.soton.ac.uk/id/eprint/497733
ISSN: 1079-7114
PURE UUID: 9e619447-9339-4f98-9724-94dc4994bd22
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Date deposited: 30 Jan 2025 17:43
Last modified: 22 Aug 2025 01:59
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Author:
Debarshi Das
Author:
Dipankar Home
Author:
Sougato Bose
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