Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

European Conference on Optical Communication

Generation of polarization entanglement converted from a spatial correlation in spontaneous parametric down-conversion

Ryōsuke Shimizu, Takahiro Yamaguchi, Yasuyoshi Mitsumori, Hideo Kosaka, Keiichi Edamatsu

Published Sep 1, 2006• 0 citations
Publisher

Abstract

We propose and demonstrate a novel scheme to generate a polarization entangled state utilizing a spatial correlation effect in parametric down-conversion. We also demonstrate the violation of Bell's inequality.
DOI
10.1109/ecoc.2006.4801390

Related papers

Polarization Entanglement Converted from Spatially Correlated Photon Pairs

Ryōsuke Shimizu, T. Yamaguchi, Yasuyoshi Mitsumori +2 more

We propose and demonstrate a novel scheme for the generation of polarization entanglement from spatially correlated photon pairs generated by parametric down-conversion. Using the state, we also demonstrate the violation of Bell's inequality.

The Rochester Conferences on Coherence and Quantum Optics and the Quantum Information and Measurement meeting•Jan 1, 2007•0 citations

Generation of polarization entanglement from spatially correlated photons in spontaneous parametric down-conversion

Ryōsuke Shimizu, Takashi Yamaguchi, Yasuyoshi Mitsumori +2 more

We propose a scheme to generate polarization entanglement from spatially correlated photon pairs. We experimentally realized a scheme by means of a spatial correlation effect in a spontaneous parametric down-conversion and a modified Michelson interferometer. The scheme we propose in this paper can be interpreted as a conversion process from spatial correlation to polarization entanglement.

arXiv:0711.4177•Physical Review A•Mar 24, 2008•8 citations

Generation of polarization entanglement utilizing spatially correlated photon pairs from spontaneous parametric down-conversion

T. Yamaguchi, Ryōsuke Shimizu, Yasuyoshi Mitsumori +2 more

Polarization entanglement of photons provides a superior environment to demonstrate quantum info-communication protocols. Thus far, several methods using parametric down-conversion process have been realized to generate polarization-entangled photon pairs. In this report, we propose a novel method to generate polarization entanglement from spatially correlated photon pairs and demonstrate its experimental verification.

Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)•Jun 1, 2007•0 citations

Polarization-entanglement generation and control in a counterpropagating phase-matching geometry

Guillaume Boucher, A. Eckstein, Adeline Orieux +6 more

We present a theoretical model to describe polarization-entanglement generation by spontaneous parametric down conversion in a transverse pump configuration. It takes into account the effect of a resonant microcavity for the pump beam and gives a direct link between the level of generated entanglement and the spatial profile of the pump beam. A pumping scheme leading to the generation of high quality Bell states is proposed.

Physical Review A•Mar 10, 2014•9 citations

Experimental Observation of Four-Photon Entanglement from Parametric Down-Conversion

Manfred Eibl, Sascha Gaertner, Mohamed Bourennane +3 more

We observe polarization entanglement between four photons produced from a single down-conversion source. The nonclassical correlations between the measurement results violate a generalized Bell inequality for four qubits. The characteristic properties and its easy generation with high interferometric contrast make the observed four-photon state well suited for implementing advanced quantum communication schemes such as multiparty quantum key distribution, secret sharing, and telecloning.

arXiv:quant-ph/0302042•Physical Review Letters•May 22, 2003•181 citations

Experimental conversion of position correlation into polarization entanglement

Chithrabhanu Perumangatt, Alexander Lohrmann, Alexander Ling

This paper presents a method to convert position correlation of photon pairs into polarization entanglement. This is achieved by individually manipulating the polarization state of photons generated in different parts of a nonlinear medium and coherently superposing them. This concept is experimentally demonstrated using photon pairs produced by spontaneous parametric down-conversion. The method is used to implement a compact source producing an observed photon-pair rate of $120\phantom{\rule{0.16em}{0ex}}000\phantom{\rule{4.pt}{0ex}}{\text{s}}^{\ensuremath{-}1}/\text{mW}$ with an entanglement fidelity of $0.991\ifmmode\pm\else\textpm\fi{}0.013$. This method can be extended to any photon-pair generation process with initial position correlation.

arXiv:1910.13149•Physical Review A•Jul 6, 2020•11 citations
This paper presents a method to convert position correlation of photon pairs into polarization entanglement. This is achieved by individually manipulating the polarization state of photons generated in different parts of a nonlinear medium and coherently superposing them. This concept is experimentally demonstrated using photon pairs produced by spontaneous parametric down-conversion. The method is used to implement a compact source producing an observed photon-pair rate of $120\phantom{\rule{0.16em}{0ex}}000\phantom{\rule{4.pt}{0ex}}{\text{s}}^{\ensuremath{-}1}/\text{mW}$ with an entanglement fidelity of $0.991\ifmmode\pm\else\textpm\fi{}0.013$. This method can be extended to any photon-pair generation process with initial position correlation.