Abstract
Can collective quantum effects make a difference in a meaningful thermodynamic operation? Focusing on energy storage and batteries, we demonstrate that quantum mechanics can lead to an enhancement in the amount of work deposited per unit time, i.e., the charging power, when batteries are charged collectively. We first derive analytic upper bounds for the collective quantum advantage in charging power for two choices of constraints on the charging Hamiltonian. We then demonstrate that even in the absence of quantum entanglement this advantage can be extensive. For our main result, we provide an upper bound to the achievable quantum advantage when the interaction order is restricted; i.e., at most batteries are interacting. This constitutes a fundamental limit on the advantage offered by quantum technologies over their classical counterparts.
- Received 20 December 2016
DOI:https://doi.org/10.1103/PhysRevLett.118.150601
© 2017 American Physical Society
Physics Subject Headings (PhySH)
Synopsis
Speeding Up Battery Charging with Quantum Physics
Published 12 April 2017
Calculations show that charging a set of batteries can go faster if the batteries are coupled together quantum mechanically.
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