Quantacell: powerful charging of quantum batteries

@article{Binder2015QuantacellPC,
  title={Quantacell: powerful charging of quantum batteries},
  author={Felix C. Binder and Sai Vinjanampathy and Kavan Modi and John Goold},
  journal={New Journal of Physics},
  year={2015},
  volume={17}
}
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… 

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