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Cited by 15Quantum Mechanics and ApplicationsQuantum Information and CryptographyQuantum optics and atomic interactions

Fidelity and Coherence Measures from Interference

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Oi, Daniel K. L., Åberg, Johan·2006·Physical Review Letters
DOI 10.1103/physrevlett.97.220404
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Abstract

By utilizing single particle interferometry, the fidelity or coherence of a pair of quantum states is identified with their capacity for interference. We consider processes acting on the internal degree of freedom (e.g., spin or polarization) of the interfering particle, preparing it in states rho_{A} or rho_{B} in the respective path of the interferometer. The maximal visibility depends on the choice of interferometer, as well as the locality or nonlocality of the preparations, but otherwise depends only on the states rho_{A} and rho_{B} and not the individual preparation processes themselves. This allows us to define interferometric measures which probe locality and correlation properties of spatially or temporally separated processes, and can be used to differentiate between processes that cannot be distinguished by direct process tomography using only the internal state of the particle.

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  • Our bound is based on the generalization of the Fubini-Study metric for mixed states motivated by [65].

    “Whereas, our bound is based on the generalization of the Fubini-Study metric for mixed states motivated by [65].”

    From Quantum coherence sets the quantum speed limit for mixed states (2016) · cites this paper as [65]

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Research works printed but not linked: 15

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Authors
Oi, D. K. L., & Åberg, J.
Affiliations
University of Cambridge (GB)
ORCID
Venue
Physical Review Letters
Publisher
American Physical Society (APS)
Published
2006-11-29
Volume
97
Issue
22
Pages
220404-220404
ISSN
  • 0031-9007 (ISSN-L)
  • 1079-7114
DOI
10.1103/physrevlett.97.220404
OpenAlex
W1991631093
Cited by
15
References
16
Citations by year
2025: 1 · 2022: 1 · 2021: 1 · 2017: 2 · 2016: 1 · 2015: 1
FWCI
1.51
Type
journal article
Language
en
Open access
Licence
link.aps.org/licenses/aps-default-license (vor)
Locations
  • Physical Review Letters (publishedVersion)
  • PubMed (publishedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • Strathprints: The University of Strathclyde institutional repository (University of Strathclyde) (submittedVersion)
  • CERN Document Server (European Organization for Nuclear Research) (submittedVersion)
  • arXiv (Cornell University)
Topics
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum Mechanics and Applications
  • Physical Sciences › Computer Science › Artificial Intelligence › Quantum Information and Cryptography
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum optics and atomic interactions
Keywords
quantum fidelity, quantum coherence, fringe visibility, quantum state discrimination, locality, nonlocality, quantum correlations, process tomography

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