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Characterization of two-photon polarization mixed states generated from entangled-classical hybrid photon source

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Title: Characterization of two-photon polarization mixed states generated from entangled-classical hybrid photon source
Authors: Kumano, H. Browse this author
Matsuda, K. Browse this author
Ekuni, S. Browse this author
Sasakura, H. Browse this author
Suemune, I. Browse this author
Issue Date: 18-Jul-2011
Publisher: Optical Society of America
Journal Title: Optics Express
Volume: 19
Issue: 15
Start Page: 14249
End Page: 14259
Publisher DOI: 10.1364/OE.19.014249
PMID: 21934789
Abstract: We experimentally prepare bi-photon mixed states in polarization employing an entangled-classical hybrid photon emitter which can properly model solid-state entangled photon sources with uncorrelated background photons. Polarization-uncorrelated photon pairs in totally mixed (TM) states are embodied with classical thermal radiation, while the polarization-entangled ones in a Bell state are generated by conventional parametric down conversion. The bi-photon states generated from the hybrid photon emitter are characterized in terms of a linear entropy-tangle plane, which reveals the formation of two-qubit Werner states. We also propose a direct way for evaluating the Werner states by means of minimal coincidence counts measurements. This simple method can be widely applicable in examining the bi-photon states from solid-state entangled photon sources, in which the polarization-entangled photon pairs have temporal correlation while the background photons in the TM states do not.
Rights: © 2011 Optical Society of America
Type: article
Appears in Collections:電子科学研究所 (Research Institute for Electronic Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 熊野 英和

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