



@article {2461,
	title = {Fluctuations in Extractable Work Bound the Charging Power of Quantum Batteries},
	journal = {Phys. Rev. Lett. },
	volume = {125},
	year = {2020},
	month = {7/22/2020},
	abstract = {<p>We study the connection between the charging power of quantum batteries and the fluctuations of the stored work. We prove that in order to have a non-zero rate of change of the extractable work, the state ρW of the battery cannot be an eigenstate of a {\textquoteleft}\emph{work operator}\&$\#$39;, defined by F \&equiv; HW + β\&minus;1log(ρW), where HW is the Hamiltonian of the battery and β is the inverse temperature of a reference thermal bath with respect to which the extractable work is calculated. We do so by proving that fluctuations in the stored work upper bound the charging power of a quantum battery. Our findings also suggest that quantum coherence in the battery enhances the charging process, which we illustrate on a toy model of a heat engine.\&nbsp;</p>},
	doi = {10.1103/PhysRevLett.125.040601},
	url = {https://arxiv.org/abs/1909.03558},
	author = {Luis Pedro Garc{\'\i}a-Pintos and Alioscia Hamma and Adolfo del Campo}
}
