General mapping of multiqudit entanglement conditions to nonseparability indicators for quantum-optical fields

Ryu Junghee , Bianca Wołoncewicz , Marcin Marciniak , Marcin Wieśniak , Marek Żukowski

Abstract

We show that any multiqudit entanglement witness leads to a nonseparability indicator for quantum optical fields, which involves intensity correlations. We get, e.g., necessary and sufficient conditions for intensity or intensity-rate correlations to reveal polarization entanglement. We also derive separability conditions for experiments involving multiport interferometers, now feasible with integrated optics. We show advantages of using intensity rates rather than intensities, e.g., a mapping of the Bell inequalities to ones for optical fields. The results have implication for studies of nonclassicality of “macroscopic” systems of undefined or uncontrollable number of "particles."
Author Ryu Junghee
Ryu Junghee,,
-
, Bianca Wołoncewicz (FMPI / ITPA)
Bianca Wołoncewicz ,,
- Institute of Theoretical Physics and Astrophysics
, Marcin Marciniak (FMPI / ITPA)
Marcin Marciniak,,
- Institute of Theoretical Physics and Astrophysics
, Marcin Wieśniak (FMPI / ITPA)
Marcin Wieśniak,,
- Institute of Theoretical Physics and Astrophysics
, Marek Żukowski (ICTQT)
Marek Żukowski,,
- International Centre for Theory of Quantum Technologies
Journal seriesPhysical Review Research, ISSN , e-ISSN 2643-1564, (0 pkt)
Issue year2019
Vol1
No3
Pages1-6
Publication size in sheets0.5
Article number032041
Keywords in Polishsplątanie kwantowe, indykator splątania, kwantowe pole optyczne, interferometry wieloportowe
Keywords in Englishquantum entanglement, entanglement witness, quantum optical field, multiport interferometers
DOIDOI:10.1103/PhysRevResearch.1.032041
URL https://journals.aps.org/prresearch/pdf/10.1103/PhysRevResearch.1.032041
Languageen angielski
LicenseRepository; published final; Uznanie Autorstwa (CC-BY); with publication
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Junghee_Ryu_General_mapping_of_multiqudit_2019.pdf 394.52 KB
Score (nominal)5
Score sourcejournalList
ScoreMinisterial score = 5.0, 07-02-2020, ArticleFromJournal
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LicencjaUtwór jest udostępniany na licencji Creative Commons Uznanie autorstwa 4.0 Międzynarodowe (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/
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