Work

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

Year: 2011

Type: article

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.

Source: Optics Express

DOI: 10.1364/oe.19.014249

Authors: H. Kumano, K. Matsuda, S. Ekuni, H. Sasakura, I. Suemune

Institutions: Hokkaido University, Research Institute for Electronic Science, Hokkaido University

Language: English

Topic: Quantum Information and Cryptography

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,270

Funders: Inamori Foundation, Japan Society for the Promotion of Science