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Fringe Visibility and Which-Way Information: An Inequality

Englert, Berthold-Georg·1996·Physical Review Letters

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Abstract

An inequality is derived according to which the fringe visibility in a two-way interferometer sets an absolute upper bound on the amount of which-way information that is potentially stored in a which-way detector. In some sense, this inequality can be regarded as quantifying the notion of wave-particle duality. The derivation of the inequality does not make use of Heisenberg's uncertainty relation in any form.

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B.-G. Englert, 1996, Acta Phys. Slov., 46, 249

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Authors: Englert, B.-G.
Affiliations: Max Planck Institute of Quantum Optics (DE)
Corresponding author: Englert, Berthold-Georg
ORCID: Englert, Berthold-Georg
Venue: Physical Review Letters
Publisher: American Physical Society (APS)
Published: 1996-09-09
Volume: 77
Issue: 11
Pages: 2154-2157
ISSN: 0031-9007 (ISSN-L)
1079-7114
DOI: 10.1103/physrevlett.77.2154
OpenAlex: W2156583743
Cited by: 821
References: 12
Citations by year: 2026: 38 · 2025: 41 · 2024: 34 · 2023: 33 · 2022: 40 · 2021: 51 · 2020: 35 · 2019: 43 · 2018: 38 · 2017: 40 · 2016: 36 · 2015: 42 · 2014: 36 · 2013: 18 · 2012: 29
FWCI: 5.51
Type: journal article
Language: en
Open access: closed
Licence: link.aps.org/licenses/aps-default-license (vor)
Locations: Physical Review Letters (publishedVersion)
PubMed (publishedVersion)
Topics: Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum Mechanics and Applications
Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum Information and Cryptography
Physical Sciences › Physics and Astronomy › Statistical and Nonlinear Physics › Quantum chaos and dynamical systems
Keywords: fringe visibility, which-way information, wave-particle duality, information-theoretic inequalities, quantum interference, complementarity

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Fringe Visibility and Which-Way Information: An Inequality

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