Few-qubit quantum refrigerator for cooling a multi-qubit system

Abstract We propose to use a few-qubit system as a compact quantum refrigerator for cooling an interacting multi-qubit system. We specifically consider a central qubit coupled to N ancilla qubits in a so-called spin-star model to be used as refrigerant by means of short interactions with a many-qubi...

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Autores principales:	Onat Arısoy, Özgür E. Müstecaplıoğlu
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/11c8cea7f90d4d7e81f7d252075ea105
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id	oai:doaj.org-article:11c8cea7f90d4d7e81f7d252075ea105
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spelling	oai:doaj.org-article:11c8cea7f90d4d7e81f7d252075ea1052021-12-02T17:45:02ZFew-qubit quantum refrigerator for cooling a multi-qubit system10.1038/s41598-021-92258-02045-2322https://doaj.org/article/11c8cea7f90d4d7e81f7d252075ea1052021-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-92258-0https://doaj.org/toc/2045-2322Abstract We propose to use a few-qubit system as a compact quantum refrigerator for cooling an interacting multi-qubit system. We specifically consider a central qubit coupled to N ancilla qubits in a so-called spin-star model to be used as refrigerant by means of short interactions with a many-qubit system to be cooled. We first show that if the interaction between the qubits is of the longitudinal and ferromagnetic Ising model form, the central qubit is colder than the environment. We summarize how preparing the refrigerant qubits using the spin-star model paves the way for the cooling of a many-qubit system by means of a collisional route to thermalization. We discuss a simple refrigeration cycle, considering the operation cost and cooling efficiency, which can be controlled by N and the qubit–qubit interaction strength. Besides, bounds on the achievable temperature are established. Such few-qubit compact quantum refrigerators can be significant to reduce dimensions of quantum technology applications, can be easy to integrate into all-qubit systems, and can increase the speed and power of quantum computing and thermal devices.Onat ArısoyÖzgür E. MüstecaplıoğluNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-16 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Onat Arısoy Özgür E. Müstecaplıoğlu Few-qubit quantum refrigerator for cooling a multi-qubit system
description	Abstract We propose to use a few-qubit system as a compact quantum refrigerator for cooling an interacting multi-qubit system. We specifically consider a central qubit coupled to N ancilla qubits in a so-called spin-star model to be used as refrigerant by means of short interactions with a many-qubit system to be cooled. We first show that if the interaction between the qubits is of the longitudinal and ferromagnetic Ising model form, the central qubit is colder than the environment. We summarize how preparing the refrigerant qubits using the spin-star model paves the way for the cooling of a many-qubit system by means of a collisional route to thermalization. We discuss a simple refrigeration cycle, considering the operation cost and cooling efficiency, which can be controlled by N and the qubit–qubit interaction strength. Besides, bounds on the achievable temperature are established. Such few-qubit compact quantum refrigerators can be significant to reduce dimensions of quantum technology applications, can be easy to integrate into all-qubit systems, and can increase the speed and power of quantum computing and thermal devices.
format	article
author	Onat Arısoy Özgür E. Müstecaplıoğlu
author_facet	Onat Arısoy Özgür E. Müstecaplıoğlu
author_sort	Onat Arısoy
title	Few-qubit quantum refrigerator for cooling a multi-qubit system
title_short	Few-qubit quantum refrigerator for cooling a multi-qubit system
title_full	Few-qubit quantum refrigerator for cooling a multi-qubit system
title_fullStr	Few-qubit quantum refrigerator for cooling a multi-qubit system
title_full_unstemmed	Few-qubit quantum refrigerator for cooling a multi-qubit system
title_sort	few-qubit quantum refrigerator for cooling a multi-qubit system
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/11c8cea7f90d4d7e81f7d252075ea105
work_keys_str_mv	AT onatarısoy fewqubitquantumrefrigeratorforcoolingamultiqubitsystem AT ozguremustecaplıoglu fewqubitquantumrefrigeratorforcoolingamultiqubitsystem
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Few-qubit quantum refrigerator for cooling a multi-qubit system

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