Continuous feedback on a quantum gas coupled to an optical cavity

@article{Kroeger2019ContinuousFO,
  title={Continuous feedback on a quantum gas coupled to an optical cavity},
  author={Katrin Kroeger and Nishant Dogra and Rodrigo Rosa-Medina and Marcin Paluch and Francesco Ferri and Tobias Donner and Tilman Esslinger},
  journal={New Journal of Physics},
  year={2019},
  volume={22}
}
We present an active feedback scheme acting continuously on the state of a quantum gas dispersively coupled to a high-finesse optical cavity. The quantum gas is subject to a transverse pump laser field inducing a self-organization phase transition, where the gas acquires a density modulation and photons are scattered into the resonator. Photons leaking from the cavity allow for a real-time and non-destructive readout of the system. We stabilize the mean intra-cavity photon number through a… 

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