Cyclic cooling of quantum systems at the saturation limit

Abstract The achievable bounds of cooling quantum systems, and the possibility to violate them is not well-explored experimentally. For example, among the common methods to enhance spin polarization (cooling), one utilizes the low temperature and high-magnetic field condition or employs a resonant e...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Sebastian Zaiser, Chun Tung Cheung, Sen Yang, Durga Bhaktavatsala Rao Dasari, Sadegh Raeisi, Jörg Wrachtrup
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Physics QC1-999 Electronic computers. Computer science QA75.5-76.95
Acceso en línea:	https://doaj.org/article/9af1b6055ed54fbda6528b50a8ac4651
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:9af1b6055ed54fbda6528b50a8ac4651
record_format	dspace
spelling	oai:doaj.org-article:9af1b6055ed54fbda6528b50a8ac46512021-12-02T15:02:24ZCyclic cooling of quantum systems at the saturation limit10.1038/s41534-021-00408-z2056-6387https://doaj.org/article/9af1b6055ed54fbda6528b50a8ac46512021-06-01T00:00:00Zhttps://doi.org/10.1038/s41534-021-00408-zhttps://doaj.org/toc/2056-6387Abstract The achievable bounds of cooling quantum systems, and the possibility to violate them is not well-explored experimentally. For example, among the common methods to enhance spin polarization (cooling), one utilizes the low temperature and high-magnetic field condition or employs a resonant exchange with highly polarized spins. The achievable polarization, in such cases, is bounded either by Boltzmann distribution or by energy conservation. Heat-bath algorithmic cooling schemes (HBAC), on the other hand, have shown the possibility to surpass the physical limit set by the energy conservation and achieve a higher saturation limit in spin cooling. Despite, the huge theoretical progress, and few principle demonstrations, neither the existence of the limit nor its application in cooling quantum systems towards the maximum achievable limit have been experimentally verified. Here, we show the experimental saturation of the HBAC limit for single nuclear spins, beyond any available polarization in solid-state spin system, the Nitrogen-Vacancy centers in diamond. We benchmark the performance of our experiment over a range of variable reset polarizations (bath temperatures), and discuss the role of quantum coherence in HBAC.Sebastian ZaiserChun Tung CheungSen YangDurga Bhaktavatsala Rao DasariSadegh RaeisiJörg WrachtrupNature PortfolioarticlePhysicsQC1-999Electronic computers. Computer scienceQA75.5-76.95ENnpj Quantum Information, Vol 7, Iss 1, Pp 1-7 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999 Electronic computers. Computer science QA75.5-76.95
spellingShingle	Physics QC1-999 Electronic computers. Computer science QA75.5-76.95 Sebastian Zaiser Chun Tung Cheung Sen Yang Durga Bhaktavatsala Rao Dasari Sadegh Raeisi Jörg Wrachtrup Cyclic cooling of quantum systems at the saturation limit
description	Abstract The achievable bounds of cooling quantum systems, and the possibility to violate them is not well-explored experimentally. For example, among the common methods to enhance spin polarization (cooling), one utilizes the low temperature and high-magnetic field condition or employs a resonant exchange with highly polarized spins. The achievable polarization, in such cases, is bounded either by Boltzmann distribution or by energy conservation. Heat-bath algorithmic cooling schemes (HBAC), on the other hand, have shown the possibility to surpass the physical limit set by the energy conservation and achieve a higher saturation limit in spin cooling. Despite, the huge theoretical progress, and few principle demonstrations, neither the existence of the limit nor its application in cooling quantum systems towards the maximum achievable limit have been experimentally verified. Here, we show the experimental saturation of the HBAC limit for single nuclear spins, beyond any available polarization in solid-state spin system, the Nitrogen-Vacancy centers in diamond. We benchmark the performance of our experiment over a range of variable reset polarizations (bath temperatures), and discuss the role of quantum coherence in HBAC.
format	article
author	Sebastian Zaiser Chun Tung Cheung Sen Yang Durga Bhaktavatsala Rao Dasari Sadegh Raeisi Jörg Wrachtrup
author_facet	Sebastian Zaiser Chun Tung Cheung Sen Yang Durga Bhaktavatsala Rao Dasari Sadegh Raeisi Jörg Wrachtrup
author_sort	Sebastian Zaiser
title	Cyclic cooling of quantum systems at the saturation limit
title_short	Cyclic cooling of quantum systems at the saturation limit
title_full	Cyclic cooling of quantum systems at the saturation limit
title_fullStr	Cyclic cooling of quantum systems at the saturation limit
title_full_unstemmed	Cyclic cooling of quantum systems at the saturation limit
title_sort	cyclic cooling of quantum systems at the saturation limit
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/9af1b6055ed54fbda6528b50a8ac4651
work_keys_str_mv	AT sebastianzaiser cycliccoolingofquantumsystemsatthesaturationlimit AT chuntungcheung cycliccoolingofquantumsystemsatthesaturationlimit AT senyang cycliccoolingofquantumsystemsatthesaturationlimit AT durgabhaktavatsalaraodasari cycliccoolingofquantumsystemsatthesaturationlimit AT sadeghraeisi cycliccoolingofquantumsystemsatthesaturationlimit AT jorgwrachtrup cycliccoolingofquantumsystemsatthesaturationlimit
_version_	1718389092613357568

Cyclic cooling of quantum systems at the saturation limit

Ejemplares similares