Dark state with counter-rotating dissipative channels

Abstract Dark state as a consequence of interference between different quantum states has great importance in the fields of chip-scale atomic clock and quantum information. For the Λ-type three-level system, this dark state is generally regarded as being dissipation-free because it is a superpositio...

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Autores principales:	Zheng-Yang Zhou, Mi Chen, Lian-Ao Wu, Ting Yu, J. Q. You
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/718090ac76244cf589f15c504e410bb0
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spelling	oai:doaj.org-article:718090ac76244cf589f15c504e410bb02021-12-02T11:52:41ZDark state with counter-rotating dissipative channels10.1038/s41598-017-06157-42045-2322https://doaj.org/article/718090ac76244cf589f15c504e410bb02017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-06157-4https://doaj.org/toc/2045-2322Abstract Dark state as a consequence of interference between different quantum states has great importance in the fields of chip-scale atomic clock and quantum information. For the Λ-type three-level system, this dark state is generally regarded as being dissipation-free because it is a superposition of two lowest states without dipole transition between them. However, previous studies are based on the rotating-wave approximation (RWA) by neglecting the counter-rotating terms in the system-environment interaction. In this work, we study non-Markovian quantum dynamics of the dark state in a Λ-type three-level system coupled to two bosonic baths and reveal the effect of counter-rotating terms on the dark state. In contrast to the dark state within the RWA, leakage of the dark state occurs even at zero temperature, as a result of these counter-rotating terms. Also, we present a method to restore the quantum coherence of the dark state by applying a leakage elimination operator to the system.Zheng-Yang ZhouMi ChenLian-Ao WuTing YuJ. Q. YouNature 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 Zheng-Yang Zhou Mi Chen Lian-Ao Wu Ting Yu J. Q. You Dark state with counter-rotating dissipative channels
description	Abstract Dark state as a consequence of interference between different quantum states has great importance in the fields of chip-scale atomic clock and quantum information. For the Λ-type three-level system, this dark state is generally regarded as being dissipation-free because it is a superposition of two lowest states without dipole transition between them. However, previous studies are based on the rotating-wave approximation (RWA) by neglecting the counter-rotating terms in the system-environment interaction. In this work, we study non-Markovian quantum dynamics of the dark state in a Λ-type three-level system coupled to two bosonic baths and reveal the effect of counter-rotating terms on the dark state. In contrast to the dark state within the RWA, leakage of the dark state occurs even at zero temperature, as a result of these counter-rotating terms. Also, we present a method to restore the quantum coherence of the dark state by applying a leakage elimination operator to the system.
format	article
author	Zheng-Yang Zhou Mi Chen Lian-Ao Wu Ting Yu J. Q. You
author_facet	Zheng-Yang Zhou Mi Chen Lian-Ao Wu Ting Yu J. Q. You
author_sort	Zheng-Yang Zhou
title	Dark state with counter-rotating dissipative channels
title_short	Dark state with counter-rotating dissipative channels
title_full	Dark state with counter-rotating dissipative channels
title_fullStr	Dark state with counter-rotating dissipative channels
title_full_unstemmed	Dark state with counter-rotating dissipative channels
title_sort	dark state with counter-rotating dissipative channels
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/718090ac76244cf589f15c504e410bb0
work_keys_str_mv	AT zhengyangzhou darkstatewithcounterrotatingdissipativechannels AT michen darkstatewithcounterrotatingdissipativechannels AT lianaowu darkstatewithcounterrotatingdissipativechannels AT tingyu darkstatewithcounterrotatingdissipativechannels AT jqyou darkstatewithcounterrotatingdissipativechannels
_version_	1718394991338848256

Dark state with counter-rotating dissipative channels

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