Time Crystals in Ultracold Matter

  title={Time Crystals in Ultracold Matter},
  author={Jos{\'e} Tito Mendonça and Viktor V. Dodonov},
  journal={Journal of Russian Laser Research},
We consider the formation of time crystals in a gas of laser-cooled atoms. We show that the phonon frequency is shifted inside a time crystal, and the phonon backscattering resulting from a temporal Bragg diffraction can be observed. A quantum-field description allows us to demonstrate that these effects are accompanied by emission of the phonon pairs from vacuum. The same description can be used for the dynamical Casimir effect, which, in some sense, is as a special case of the time crystal… 
6 Citations

Temporal optical processes in a Rydberg gas

  • J. T. Mendonça
  • Physics
    Journal of Physics B: Atomic, Molecular and Optical Physics
  • 2020
In this paper, we discuss temporal optical phenomena in a gas of Rydberg atoms, which can take place in the presence of varying quasi-static electric fields and control laser beams. This includes the

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