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Time-bin entangled photons from a quantum dot

Long distance quantum communication is one of the prime goals in the field of quantum information science. With information encoded in the quantum state of photons, existing telecommunication fibre networks can be effectively used as a transport medium. To achieve this goal, a source of robust entan...

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Detalles Bibliográficos
Autores principales: Jayakumar, Harishankar, Predojević, Ana, Kauten, Thomas, Huber, Tobias, Solomon, Glenn S., Weihs, Gregor
Formato: Online Artículo Texto
Lenguaje:English
Publicado: 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4108004/
https://www.ncbi.nlm.nih.gov/pubmed/24968024
http://dx.doi.org/10.1038/ncomms5251
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author Jayakumar, Harishankar
Predojević, Ana
Kauten, Thomas
Huber, Tobias
Solomon, Glenn S.
Weihs, Gregor
author_facet Jayakumar, Harishankar
Predojević, Ana
Kauten, Thomas
Huber, Tobias
Solomon, Glenn S.
Weihs, Gregor
author_sort Jayakumar, Harishankar
collection PubMed
description Long distance quantum communication is one of the prime goals in the field of quantum information science. With information encoded in the quantum state of photons, existing telecommunication fibre networks can be effectively used as a transport medium. To achieve this goal, a source of robust entangled single photon pairs is required. Here, we report the realization of a source of time-bin entangled photon pairs utilizing the biexciton-exciton cascade in a III/V self-assembled quantum dot. We analyse the generated photon pairs by an inherently phase-stable interferometry technique, facilitating uninterrupted long integration times. We confirm the entanglement by performing quantum state tomography of the emitted photons, which yields a fidelity of 0.69(3) and a concurrence of 0.41(6) for our realization of time-energy entanglement from a single quantum emitter.
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spelling pubmed-41080042014-12-26 Time-bin entangled photons from a quantum dot Jayakumar, Harishankar Predojević, Ana Kauten, Thomas Huber, Tobias Solomon, Glenn S. Weihs, Gregor Nat Commun Article Long distance quantum communication is one of the prime goals in the field of quantum information science. With information encoded in the quantum state of photons, existing telecommunication fibre networks can be effectively used as a transport medium. To achieve this goal, a source of robust entangled single photon pairs is required. Here, we report the realization of a source of time-bin entangled photon pairs utilizing the biexciton-exciton cascade in a III/V self-assembled quantum dot. We analyse the generated photon pairs by an inherently phase-stable interferometry technique, facilitating uninterrupted long integration times. We confirm the entanglement by performing quantum state tomography of the emitted photons, which yields a fidelity of 0.69(3) and a concurrence of 0.41(6) for our realization of time-energy entanglement from a single quantum emitter. 2014-06-26 /pmc/articles/PMC4108004/ /pubmed/24968024 http://dx.doi.org/10.1038/ncomms5251 Text en Users may view, print, copy, and download text and data-mine the content in such documents, for the purposes of academic research, subject always to the full Conditions of use:http://www.nature.com/authors/editorial_policies/license.html#terms
spellingShingle Article
Jayakumar, Harishankar
Predojević, Ana
Kauten, Thomas
Huber, Tobias
Solomon, Glenn S.
Weihs, Gregor
Time-bin entangled photons from a quantum dot
title Time-bin entangled photons from a quantum dot
title_full Time-bin entangled photons from a quantum dot
title_fullStr Time-bin entangled photons from a quantum dot
title_full_unstemmed Time-bin entangled photons from a quantum dot
title_short Time-bin entangled photons from a quantum dot
title_sort time-bin entangled photons from a quantum dot
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4108004/
https://www.ncbi.nlm.nih.gov/pubmed/24968024
http://dx.doi.org/10.1038/ncomms5251
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