Quantum-enhanced multiparameter sensing in a single mode.

Valahu, CH; Stafford, MP; Huang, Z; Matsos, VG; Millican, MJ; Chalermpusitarak, T; Menicucci, NC; Combes, J; Baragiola, BQ; Tan, TR

Quantum-enhanced multiparameter sensing in a single mode.

Valahu, CH Stafford, MP Huang, Z Matsos, VG Millican, MJ Chalermpusitarak, T Menicucci, NC Combes, J Baragiola, BQ Tan, TR

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Publisher:: American Association for the Advancement of Science (AAAS)
Publication Type:: Journal Article
Citation:: Sci Adv, 2025, 11, (39), pp. eadw9757
Issue Date:: 2025-09-26

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Field	Value	Language
dc.contributor.author	Valahu, CH
dc.contributor.author	Stafford, MP
dc.contributor.author	Huang, Z
dc.contributor.author	Matsos, VG
dc.contributor.author	Millican, MJ
dc.contributor.author	Chalermpusitarak, T
dc.contributor.author	Menicucci, NC
dc.contributor.author	Combes, J
dc.contributor.author	Baragiola, BQ
dc.contributor.author	Tan, TR
dc.date.accessioned	2026-06-02T05:18:10Z
dc.date.available	2026-06-02T05:18:10Z
dc.date.issued	2025-09-26
dc.identifier.citation	Sci Adv, 2025, 11, (39), pp. eadw9757
dc.identifier.issn	2375-2548
dc.identifier.issn	2375-2548
dc.identifier.uri	http://hdl.handle.net/10453/195207
dc.description.abstract	Precise measurements underpin scientific and technological advancements. Quantum mechanics provides an avenue to enhance precision, but it comes with a restriction: Incompatible observables, such as position and momentum, cannot be simultaneously measured to arbitrary accuracy as decreed by Heisenberg's uncertainty principle. This restriction can be bypassed by instead measuring commuting modular observables, which are counterparts to the naturally incompatible observables. Here, we measure modular observables to estimate small changes in position and momentum with a single-mode multiparameter sensor. We deterministically prepare grid states in the mechanical motion of a trapped ion and demonstrate uncertainties in position and momentum below the standard quantum limit (SQL). Further, we examine another pair of incompatible observables-number and phase. We prepare a different resource-number-phase states-and demonstrate a metrological gain over the SQL. These results introduce previously unidentified measurement capabilities unavailable to classical systems and mark a substantial step in quantum metrology.
dc.format	Print-Electronic
dc.language	eng
dc.publisher	American Association for the Advancement of Science (AAAS)
dc.relation	http://purl.org/au-research/grants/arc/CE170100012
dc.relation.ispartof	Sci Adv
dc.relation.isbasedon	10.1126/sciadv.adw9757
dc.rights	info:eu-repo/semantics/openAccess
dc.title	Quantum-enhanced multiparameter sensing in a single mode.
dc.type	Journal Article
utslib.citation.volume	11
utslib.location.activity	United States
pubs.organisational-group	University of Technology Sydney
pubs.organisational-group	University of Technology Sydney/Faculty of Engineering and Information Technology
utslib.copyright.status	open_access	*
dc.rights.license	This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0). To view a copy of this license, visit https://creativecommons.org/licenses/by-nc/4.0/
dc.date.updated	2026-06-02T05:18:08Z
pubs.issue	39
pubs.publication-status	Published
pubs.volume	11
utslib.citation.issue	39

Abstract:

Precise measurements underpin scientific and technological advancements. Quantum mechanics provides an avenue to enhance precision, but it comes with a restriction: Incompatible observables, such as position and momentum, cannot be simultaneously measured to arbitrary accuracy as decreed by Heisenberg's uncertainty principle. This restriction can be bypassed by instead measuring commuting modular observables, which are counterparts to the naturally incompatible observables. Here, we measure modular observables to estimate small changes in position and momentum with a single-mode multiparameter sensor. We deterministically prepare grid states in the mechanical motion of a trapped ion and demonstrate uncertainties in position and momentum below the standard quantum limit (SQL). Further, we examine another pair of incompatible observables-number and phase. We prepare a different resource-number-phase states-and demonstrate a metrological gain over the SQL. These results introduce previously unidentified measurement capabilities unavailable to classical systems and mark a substantial step in quantum metrology.

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http://hdl.handle.net/10453/195207