中文版 | English
Title

Experimental Realization of a Quantum Refrigerator Driven by Indefinite Causal Orders

Author
Corresponding AuthorDong,Ying; Xin,Tao; Lu,Dawei
Joint first authorNie,Xinfang; Zhu,Xuanran
Publication Years
2022-09-02
DOI
Source Title
ISSN
0031-9007
EISSN
1079-7114
Volume129Issue:10
Abstract

Indefinite causal order (ICO) is playing a key role in recent quantum technologies. Here, we experimentally study quantum thermodynamics driven by ICO on nuclear spins using the nuclear magnetic resonance system. We realize the ICO of two thermalizing channels to exhibit how the mechanism works, and show that the working substance can be cooled or heated albeit it undergoes thermal contacts with reservoirs of the same temperature. Moreover, we construct a single cycle of the ICO refrigerator based on the Maxwell's demon mechanism, and evaluate its performance by measuring the work consumption and the heat energy extracted from the low-temperature reservoir. Unlike classical refrigerators in which the coefficient of performance (COP) is perversely higher the closer the temperature of the high-temperature and low-temperature reservoirs are to each other, the ICO refrigerator's COP is always bounded to small values due to the nonunit success probability in projecting the ancillary qubit to the preferable subspace. To enhance the COP, we propose and experimentally demonstrate a general framework based on the density matrix exponentiation (DME) approach, as an extension to the ICO refrigeration. The COP is observed to be enhanced by more than 3 times with the DME approach. Our Letter demonstrates a new way for nonclassical heat exchange, and paves the way towards construction of quantum refrigerators on a quantum system.

URL[Source Record]
Indexed By
Language
English
Important Publications
NI Journal Papers
SUSTech Authorship
First ; 共同第一 ; Corresponding
Funding Project
National Key Research and Development Program of China[2019YFA0308100] ; National Natural Science Foundation of China[
WOS Research Area
Physics
WOS Subject
Physics, Multidisciplinary
WOS Accession No
WOS:000933695700002
Publisher
ESI Research Field
PHYSICS
Data Source
Web of Science
Citation statistics
Cited Times [WOS]:12
Document TypeJournal Article
Identifierhttp://kc.sustech.edu.cn/handle/2SGJ60CL/402706
DepartmentDepartment of Physics
量子科学与工程研究院
Affiliation
1.Shenzhen Institute for Quantum Science and Engineering,Department of Physics,Southern University of Science and Technology,Shenzhen,518055,China
2.Guangdong Provincial Key Laboratory of Quantum Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
3.Research Center for Quantum Sensing,Zhejiang Lab,Hangzhou,Zhejiang,311121,China
First Author AffilicationDepartment of Physics;  Institute for Quantum Science and Engineering
Corresponding Author AffilicationDepartment of Physics;  Institute for Quantum Science and Engineering
First Author's First AffilicationDepartment of Physics;  Institute for Quantum Science and Engineering
Recommended Citation
GB/T 7714
Nie,Xinfang,Zhu,Xuanran,Huang,Keyi,et al. Experimental Realization of a Quantum Refrigerator Driven by Indefinite Causal Orders[J]. PHYSICAL REVIEW LETTERS,2022,129(10).
APA
Nie,Xinfang.,Zhu,Xuanran.,Huang,Keyi.,Tang,Kai.,Long,Xinyue.,...&Lu,Dawei.(2022).Experimental Realization of a Quantum Refrigerator Driven by Indefinite Causal Orders.PHYSICAL REVIEW LETTERS,129(10).
MLA
Nie,Xinfang,et al."Experimental Realization of a Quantum Refrigerator Driven by Indefinite Causal Orders".PHYSICAL REVIEW LETTERS 129.10(2022).
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