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Quantum Charging Advantage Cannot Be Extensive without Global Operations

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Title
Quantum Charging Advantage Cannot Be Extensive without Global Operations
Author(s)
Ju-Yeon Gyhm; Dominik Šafránek; Dario Rosa
Publication Date
2022-04
Journal
Physical Review Letters, v.128, no.14
Publisher
American Physical Society
Abstract
© 2022 American Physical Society.Quantum batteries are devices made from quantum states, which store and release energy in a fast and efficient manner, thus offering numerous possibilities in future technological applications. They offer a significant charging speedup when compared to classical batteries, due to the possibility of using entangling charging operations. We show that the maximal speedup that can be achieved is extensive in the number of cells, thus offering at most quadratic scaling in the charging power over the classically achievable linear scaling. To reach such a scaling, a global charging protocol, charging all the cells collectively, needs to be employed. This concludes the quest on the limits of charging power of quantum batteries and adds to other results in which quantum methods are known to provide at most quadratic scaling over their classical counterparts.
URI
https://pr.ibs.re.kr/handle/8788114/11422
DOI
10.1103/PhysRevLett.128.140501
ISSN
0031-9007
Appears in Collections:
Center for Theoretical Physics of Complex Systems(복잡계 이론물리 연구단) > 1. Journal Papers (저널논문)
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