Observation of strongly entangled photon pairs from a nanowire quantum dot

A bright photon source that combines high-fidelity entanglement, on-demand generation, high extraction efficiency, directional and coherent emission, as well as position control at the nanoscale is required for implementing ambitious schemes in quantum information processing, such as that of a quant...

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Main Authors:	Versteegh, Marijn A. M., Reimer, Michael E., Jöns, Klaus D., Dalacu, Dan, Poole, Philip J., Gulinatti, Angelo, Giudice, Andrea, Zwiller, Val
Format:	Online
Language:	English
Published:	Nature Pub. Group 2014
Online Access:	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4220459/

id	pubmed-4220459
recordtype	oai_dc
spelling	pubmed-42204592014-11-13 Observation of strongly entangled photon pairs from a nanowire quantum dot Versteegh, Marijn A. M. Reimer, Michael E. Jöns, Klaus D. Dalacu, Dan Poole, Philip J. Gulinatti, Angelo Giudice, Andrea Zwiller, Val Article A bright photon source that combines high-fidelity entanglement, on-demand generation, high extraction efficiency, directional and coherent emission, as well as position control at the nanoscale is required for implementing ambitious schemes in quantum information processing, such as that of a quantum repeater. Still, all of these properties have not yet been achieved in a single device. Semiconductor quantum dots embedded in nanowire waveguides potentially satisfy all of these requirements; however, although theoretically predicted, entanglement has not yet been demonstrated for a nanowire quantum dot. Here, we demonstrate a bright and coherent source of strongly entangled photon pairs from a position-controlled nanowire quantum dot with a fidelity as high as 0.859±0.006 and concurrence of 0.80±0.02. The two-photon quantum state is modified via the nanowire shape. Our new nanoscale entangled photon source can be integrated at desired positions in a quantum photonic circuit, single-electron devices and light-emitting diodes. Nature Pub. Group 2014-10-31 /pmc/articles/PMC4220459/ /pubmed/25358656 http://dx.doi.org/10.1038/ncomms6298 Text en Copyright © 2014, Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
repository_type	Open Access Journal
institution_category	Foreign Institution
institution	US National Center for Biotechnology Information
building	NCBI PubMed
collection	Online Access
language	English
format	Online
author	Versteegh, Marijn A. M. Reimer, Michael E. Jöns, Klaus D. Dalacu, Dan Poole, Philip J. Gulinatti, Angelo Giudice, Andrea Zwiller, Val
spellingShingle	Versteegh, Marijn A. M. Reimer, Michael E. Jöns, Klaus D. Dalacu, Dan Poole, Philip J. Gulinatti, Angelo Giudice, Andrea Zwiller, Val Observation of strongly entangled photon pairs from a nanowire quantum dot
author_facet	Versteegh, Marijn A. M. Reimer, Michael E. Jöns, Klaus D. Dalacu, Dan Poole, Philip J. Gulinatti, Angelo Giudice, Andrea Zwiller, Val
author_sort	Versteegh, Marijn A. M.
title	Observation of strongly entangled photon pairs from a nanowire quantum dot
title_short	Observation of strongly entangled photon pairs from a nanowire quantum dot
title_full	Observation of strongly entangled photon pairs from a nanowire quantum dot
title_fullStr	Observation of strongly entangled photon pairs from a nanowire quantum dot
title_full_unstemmed	Observation of strongly entangled photon pairs from a nanowire quantum dot
title_sort	observation of strongly entangled photon pairs from a nanowire quantum dot
description	A bright photon source that combines high-fidelity entanglement, on-demand generation, high extraction efficiency, directional and coherent emission, as well as position control at the nanoscale is required for implementing ambitious schemes in quantum information processing, such as that of a quantum repeater. Still, all of these properties have not yet been achieved in a single device. Semiconductor quantum dots embedded in nanowire waveguides potentially satisfy all of these requirements; however, although theoretically predicted, entanglement has not yet been demonstrated for a nanowire quantum dot. Here, we demonstrate a bright and coherent source of strongly entangled photon pairs from a position-controlled nanowire quantum dot with a fidelity as high as 0.859±0.006 and concurrence of 0.80±0.02. The two-photon quantum state is modified via the nanowire shape. Our new nanoscale entangled photon source can be integrated at desired positions in a quantum photonic circuit, single-electron devices and light-emitting diodes.
publisher	Nature Pub. Group
publishDate	2014
url	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4220459/
_version_	1613152339278954496

Observation of strongly entangled photon pairs from a nanowire quantum dot

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