A controlled ac Stark echo for quantum memories

Abstract A quantum memory protocol of controlled ac Stark echoes (CASE) based on a double rephasing photon echo scheme via controlled Rabi flopping is proposed. The double rephasing scheme of photon echoes inherently satisfies the no-population inversion requirement for quantum memories, but the res...

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Autor principal:	Byoung S. Ham
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/f3d66008aff1490181a1a41f10e9e8bc
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spelling	oai:doaj.org-article:f3d66008aff1490181a1a41f10e9e8bc2021-12-02T11:53:02ZA controlled ac Stark echo for quantum memories10.1038/s41598-017-08051-52045-2322https://doaj.org/article/f3d66008aff1490181a1a41f10e9e8bc2017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-08051-5https://doaj.org/toc/2045-2322Abstract A quantum memory protocol of controlled ac Stark echoes (CASE) based on a double rephasing photon echo scheme via controlled Rabi flopping is proposed. The double rephasing scheme of photon echoes inherently satisfies the no-population inversion requirement for quantum memories, but the resultant absorptive echo remains a fundamental problem. Herein, it is reported that the first echo in the double rephasing scheme can be dynamically controlled so that it does not affect the second echo, which is accomplished by using unbalanced ac Stark shifts. Then, the second echo is coherently controlled to be emissive via controlled coherence conversion. Finally a near perfect ultralong CASE is presented using a backward echo scheme. Compared with other methods such as dc Stark echoes, the present protocol is all-optical with advantages of wavelength-selective dynamic control of quantum processing for erasing, buffering, and channel multiplexing.Byoung S. HamNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-11 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Byoung S. Ham A controlled ac Stark echo for quantum memories
description	Abstract A quantum memory protocol of controlled ac Stark echoes (CASE) based on a double rephasing photon echo scheme via controlled Rabi flopping is proposed. The double rephasing scheme of photon echoes inherently satisfies the no-population inversion requirement for quantum memories, but the resultant absorptive echo remains a fundamental problem. Herein, it is reported that the first echo in the double rephasing scheme can be dynamically controlled so that it does not affect the second echo, which is accomplished by using unbalanced ac Stark shifts. Then, the second echo is coherently controlled to be emissive via controlled coherence conversion. Finally a near perfect ultralong CASE is presented using a backward echo scheme. Compared with other methods such as dc Stark echoes, the present protocol is all-optical with advantages of wavelength-selective dynamic control of quantum processing for erasing, buffering, and channel multiplexing.
format	article
author	Byoung S. Ham
author_facet	Byoung S. Ham
author_sort	Byoung S. Ham
title	A controlled ac Stark echo for quantum memories
title_short	A controlled ac Stark echo for quantum memories
title_full	A controlled ac Stark echo for quantum memories
title_fullStr	A controlled ac Stark echo for quantum memories
title_full_unstemmed	A controlled ac Stark echo for quantum memories
title_sort	controlled ac stark echo for quantum memories
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/f3d66008aff1490181a1a41f10e9e8bc
work_keys_str_mv	AT byoungsham acontrolledacstarkechoforquantummemories AT byoungsham controlledacstarkechoforquantummemories
_version_	1718394902694330368

A controlled ac Stark echo for quantum memories

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