Floquet-state cooling

@article{Diermann2019FloquetstateC,
  title={Floquet-state cooling},
  author={Onno R. Diermann and Martin Holthaus},
  journal={Scientific Reports},
  year={2019},
  volume={9}
}
We demonstrate that a periodically driven quantum system can adopt a quasistationary state which is effectively much colder than a thermal reservoir it is coupled to, in the sense that certain Floquet states of the driven-dissipative system can carry much higher population than the ground state of the corresponding undriven system in thermal equilibrium. This is made possible by a rich Fourier spectrum of the system’s Floquet transition matrix elements, the components of which are addressed… 

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