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- Publisher Website: 10.1103/PhysRevLett.130.170201
- Scopus: eid_2-s2.0-85158845961
- PMID: 37172250
- WOS: WOS:000992461300001
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Article: Measuring Incompatibility and Clustering Quantum Observables with a Quantum Switch
Title | Measuring Incompatibility and Clustering Quantum Observables with a Quantum Switch |
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Authors | |
Issue Date | 27-Apr-2023 |
Publisher | American Physical Society |
Citation | Physical Review Letters, 2023, v. 130, n. 17 How to Cite? |
Abstract | The existence of incompatible observables is a cornerstone of quantum mechanics and a valuable resource in quantum technologies. Here we introduce a measure of incompatibility, called the mutual eigenspace disturbance (MED), which quantifies the amount of disturbance induced by the measurement of a sharp observable on the eigenspaces of another. The MED provides a metric on the space of von Neumann measurements, and can be efficiently estimated by letting the measurement processes act in an indefinite order, using a setup known as the quantum switch, which also allows one to quantify the noncommutativity of arbitrary quantum processes. Thanks to these features, the MED can be used in quantum machine learning tasks. We demonstrate this application by providing an unsupervised algorithm that clusters unknown von Neumann measurements. Our algorithm is robust to noise and can be used to identify groups of observers that share approximately the same measurement context. |
Persistent Identifier | http://hdl.handle.net/10722/331893 |
ISSN | 2021 Impact Factor: 9.185 2020 SCImago Journal Rankings: 3.688 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Gao, N | - |
dc.contributor.author | Li, DT | - |
dc.contributor.author | Mishra, A | - |
dc.contributor.author | Yan, JC | - |
dc.contributor.author | Simonov, K | - |
dc.contributor.author | Chiribella, G | - |
dc.date.accessioned | 2023-09-28T04:59:25Z | - |
dc.date.available | 2023-09-28T04:59:25Z | - |
dc.date.issued | 2023-04-27 | - |
dc.identifier.citation | Physical Review Letters, 2023, v. 130, n. 17 | - |
dc.identifier.issn | 0031-9007 | - |
dc.identifier.uri | http://hdl.handle.net/10722/331893 | - |
dc.description.abstract | <p>The existence of incompatible observables is a cornerstone of quantum mechanics and a valuable resource in quantum technologies. Here we introduce a measure of incompatibility, called the mutual eigenspace disturbance (MED), which quantifies the amount of disturbance induced by the measurement of a sharp observable on the eigenspaces of another. The MED provides a metric on the space of von Neumann measurements, and can be efficiently estimated by letting the measurement processes act in an indefinite order, using a setup known as the quantum switch, which also allows one to quantify the noncommutativity of arbitrary quantum processes. Thanks to these features, the MED can be used in quantum machine learning tasks. We demonstrate this application by providing an unsupervised algorithm that clusters unknown von Neumann measurements. Our algorithm is robust to noise and can be used to identify groups of observers that share approximately the same measurement context.</p> | - |
dc.language | eng | - |
dc.publisher | American Physical Society | - |
dc.relation.ispartof | Physical Review Letters | - |
dc.rights | This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. | - |
dc.title | Measuring Incompatibility and Clustering Quantum Observables with a Quantum Switch | - |
dc.type | Article | - |
dc.identifier.doi | 10.1103/PhysRevLett.130.170201 | - |
dc.identifier.pmid | 37172250 | - |
dc.identifier.scopus | eid_2-s2.0-85158845961 | - |
dc.identifier.volume | 130 | - |
dc.identifier.issue | 17 | - |
dc.identifier.eissn | 1079-7114 | - |
dc.identifier.isi | WOS:000992461300001 | - |
dc.publisher.place | COLLEGE PK | - |
dc.identifier.issnl | 0031-9007 | - |