Quantum interferometric generation of polarization entangled photons

Quantum interference, like Hong-Ou-Mandel interference, has played an important role to test fundamental concepts in quantum physics. We experimentally show that the multiple quantum interference effects enable the generation of high-performance polarization entangled photons. These photons have a h...

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Bibliographic Details
Published in:Scientific reports 2018-10, Vol.8 (1), p.15733-8, Article 15733
Main Authors: Terashima, Haruka, Kobayashi, Satoshi, Tsubakiyama, Takaho, Sanaka, Kaoru
Format: Article
Language:English
Subjects:
639/624/400/482
639/766/400/3925
639/766/483/481
Humanities and Social Sciences
multidisciplinary
Photons
Polarization
Quantum theory
Science
Science (multidisciplinary)
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Summary:Quantum interference, like Hong-Ou-Mandel interference, has played an important role to test fundamental concepts in quantum physics. We experimentally show that the multiple quantum interference effects enable the generation of high-performance polarization entangled photons. These photons have a high-emission rate, are degenerate, have a broadband distribution, and are postselection free. A quantum interferometric scheme, based on a round-trip configuration of a double-pass polarization Sagnac interferometer, makes it possible to use the large generation efficiency of polarization entangled photons in the process of parametric down-conversion and to separate degenerate photon pairs into different optical modes with no requirement of postselection. We demonstrate experimentally that multiple quantum interference is not only an interesting fundamental quantum optical phenomenon but can be used for novel photonic quantum information technologies.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-018-33876-z