Quantacell: powerful charging of quantum batteries

Felix C Binder, Sai Vinjanampathy, Kavan Modi, John Goold

Research output: Contribution to journalArticleResearchpeer-review

119 Citations (Scopus)


We study the problem of charging a quantum battery in finite time. We demonstrate an analytical optimal protocol for the case of a single qubit. Extending this analysis to an array of N qubits, we demonstrate that an N-fold advantage in power per qubit can be achieved when global operations are permitted. The exemplary analytic argument for this quantum advantage in the charging power is backed up by numerical analysis using optimal control techniques. It is demonstrated that the quantum advantage for power holds when, with cyclic operation in mind, initial and final states are required to be separable.
Original languageEnglish
Article number075015
Number of pages7
JournalNew Journal of Physics
Publication statusPublished - 2015


  • quantum thermodynamics
  • quantum information
  • work extraction

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