Experimental demonstration of robust entanglement distribution over reciprocal noisy channels assisted by a counter-propagating classical reference light

Abstract Embedding a quantum state in a decoherence-free subspace (DFS) formed by multiple photons is one of the promising methods for robust entanglement distribution of photonic states over collective noisy channels. In practice, however, such a scheme suffers from a low efficiency proportional to...

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Autores principales:	Rikizo Ikuta, Shota Nozaki, Takashi Yamamoto, Masato Koashi, Nobuyuki Imoto
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/530dfcd5012a4e65b21c7e4d599cb78c
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id	oai:doaj.org-article:530dfcd5012a4e65b21c7e4d599cb78c
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spelling	oai:doaj.org-article:530dfcd5012a4e65b21c7e4d599cb78c2021-12-02T12:32:15ZExperimental demonstration of robust entanglement distribution over reciprocal noisy channels assisted by a counter-propagating classical reference light10.1038/s41598-017-05008-62045-2322https://doaj.org/article/530dfcd5012a4e65b21c7e4d599cb78c2017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-05008-6https://doaj.org/toc/2045-2322Abstract Embedding a quantum state in a decoherence-free subspace (DFS) formed by multiple photons is one of the promising methods for robust entanglement distribution of photonic states over collective noisy channels. In practice, however, such a scheme suffers from a low efficiency proportional to transmittance of the channel to the power of the number of photons forming the DFS. The use of a counter-propagating coherent pulse can improve the efficiency to scale linearly in the channel transmission, but it achieves only protection against phase noises. Recently, it was theoretically proposed [Phys. Rev. A 87, 052325(2013)] that the protection against bit-flip noises can also be achieved if the channel has a reciprocal property. Here we experimentally demonstrate the proposed scheme to distribute polarization-entangled photon pairs against a general collective noise including the bit flip noise and the phase noise. We observed an efficient sharing rate scaling while keeping a high quality of the distributed entangled state. Furthermore, we show that the method is applicable not only to the entanglement distribution but also to the transmission of arbitrary polarization states of a single photon.Rikizo IkutaShota NozakiTakashi YamamotoMasato KoashiNobuyuki ImotoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-7 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Rikizo Ikuta Shota Nozaki Takashi Yamamoto Masato Koashi Nobuyuki Imoto Experimental demonstration of robust entanglement distribution over reciprocal noisy channels assisted by a counter-propagating classical reference light
description	Abstract Embedding a quantum state in a decoherence-free subspace (DFS) formed by multiple photons is one of the promising methods for robust entanglement distribution of photonic states over collective noisy channels. In practice, however, such a scheme suffers from a low efficiency proportional to transmittance of the channel to the power of the number of photons forming the DFS. The use of a counter-propagating coherent pulse can improve the efficiency to scale linearly in the channel transmission, but it achieves only protection against phase noises. Recently, it was theoretically proposed [Phys. Rev. A 87, 052325(2013)] that the protection against bit-flip noises can also be achieved if the channel has a reciprocal property. Here we experimentally demonstrate the proposed scheme to distribute polarization-entangled photon pairs against a general collective noise including the bit flip noise and the phase noise. We observed an efficient sharing rate scaling while keeping a high quality of the distributed entangled state. Furthermore, we show that the method is applicable not only to the entanglement distribution but also to the transmission of arbitrary polarization states of a single photon.
format	article
author	Rikizo Ikuta Shota Nozaki Takashi Yamamoto Masato Koashi Nobuyuki Imoto
author_facet	Rikizo Ikuta Shota Nozaki Takashi Yamamoto Masato Koashi Nobuyuki Imoto
author_sort	Rikizo Ikuta
title	Experimental demonstration of robust entanglement distribution over reciprocal noisy channels assisted by a counter-propagating classical reference light
title_short	Experimental demonstration of robust entanglement distribution over reciprocal noisy channels assisted by a counter-propagating classical reference light
title_full	Experimental demonstration of robust entanglement distribution over reciprocal noisy channels assisted by a counter-propagating classical reference light
title_fullStr	Experimental demonstration of robust entanglement distribution over reciprocal noisy channels assisted by a counter-propagating classical reference light
title_full_unstemmed	Experimental demonstration of robust entanglement distribution over reciprocal noisy channels assisted by a counter-propagating classical reference light
title_sort	experimental demonstration of robust entanglement distribution over reciprocal noisy channels assisted by a counter-propagating classical reference light
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/530dfcd5012a4e65b21c7e4d599cb78c
work_keys_str_mv	AT rikizoikuta experimentaldemonstrationofrobustentanglementdistributionoverreciprocalnoisychannelsassistedbyacounterpropagatingclassicalreferencelight AT shotanozaki experimentaldemonstrationofrobustentanglementdistributionoverreciprocalnoisychannelsassistedbyacounterpropagatingclassicalreferencelight AT takashiyamamoto experimentaldemonstrationofrobustentanglementdistributionoverreciprocalnoisychannelsassistedbyacounterpropagatingclassicalreferencelight AT masatokoashi experimentaldemonstrationofrobustentanglementdistributionoverreciprocalnoisychannelsassistedbyacounterpropagatingclassicalreferencelight AT nobuyukiimoto experimentaldemonstrationofrobustentanglementdistributionoverreciprocalnoisychannelsassistedbyacounterpropagatingclassicalreferencelight
_version_	1718394154764992512

Experimental demonstration of robust entanglement distribution over reciprocal noisy channels assisted by a counter-propagating classical reference light

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