Analysis of phase noise effects in a coupled Mach–Zehnder interferometer for a much stabilized free-space optical link

Abstract Recently, new physics for unconditional security in a classical key distribution (USCKD) has been proposed and demonstrated in a frame of a double Mach–Zehnder interferometer (MZI) as a proof of principle, where the unconditional security is rooted in MZI channel superposition. Due to envir...

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Autor principal:	Byoung S. Ham
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/d87fa4f25cc7448c998f21beee88cbdd
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spelling	oai:doaj.org-article:d87fa4f25cc7448c998f21beee88cbdd2021-12-02T13:56:56ZAnalysis of phase noise effects in a coupled Mach–Zehnder interferometer for a much stabilized free-space optical link10.1038/s41598-021-81522-y2045-2322https://doaj.org/article/d87fa4f25cc7448c998f21beee88cbdd2021-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-81522-yhttps://doaj.org/toc/2045-2322Abstract Recently, new physics for unconditional security in a classical key distribution (USCKD) has been proposed and demonstrated in a frame of a double Mach–Zehnder interferometer (MZI) as a proof of principle, where the unconditional security is rooted in MZI channel superposition. Due to environmental phase noise caused by temperature variations, atmospheric turbulences, and mechanical vibrations, free-space optical links have been severely challenged for both classical and quantum communications. Here, the double MZI scheme of USCKD is analyzed for greatly subdued environment-caused phase noise via double unitary transformation, resulting in potential applications of free-space optical links, where the free-space optical link has been a major research area from fundamental physics of atomic clock and quantum key distribution to potential applications of geodesy, navigation, and MIMO technologies in mobile communications systems.Byoung S. HamNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Byoung S. Ham Analysis of phase noise effects in a coupled Mach–Zehnder interferometer for a much stabilized free-space optical link
description	Abstract Recently, new physics for unconditional security in a classical key distribution (USCKD) has been proposed and demonstrated in a frame of a double Mach–Zehnder interferometer (MZI) as a proof of principle, where the unconditional security is rooted in MZI channel superposition. Due to environmental phase noise caused by temperature variations, atmospheric turbulences, and mechanical vibrations, free-space optical links have been severely challenged for both classical and quantum communications. Here, the double MZI scheme of USCKD is analyzed for greatly subdued environment-caused phase noise via double unitary transformation, resulting in potential applications of free-space optical links, where the free-space optical link has been a major research area from fundamental physics of atomic clock and quantum key distribution to potential applications of geodesy, navigation, and MIMO technologies in mobile communications systems.
format	article
author	Byoung S. Ham
author_facet	Byoung S. Ham
author_sort	Byoung S. Ham
title	Analysis of phase noise effects in a coupled Mach–Zehnder interferometer for a much stabilized free-space optical link
title_short	Analysis of phase noise effects in a coupled Mach–Zehnder interferometer for a much stabilized free-space optical link
title_full	Analysis of phase noise effects in a coupled Mach–Zehnder interferometer for a much stabilized free-space optical link
title_fullStr	Analysis of phase noise effects in a coupled Mach–Zehnder interferometer for a much stabilized free-space optical link
title_full_unstemmed	Analysis of phase noise effects in a coupled Mach–Zehnder interferometer for a much stabilized free-space optical link
title_sort	analysis of phase noise effects in a coupled mach–zehnder interferometer for a much stabilized free-space optical link
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/d87fa4f25cc7448c998f21beee88cbdd
work_keys_str_mv	AT byoungsham analysisofphasenoiseeffectsinacoupledmachzehnderinterferometerforamuchstabilizedfreespaceopticallink
_version_	1718392350166745088

Analysis of phase noise effects in a coupled Mach–Zehnder interferometer for a much stabilized free-space optical link

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