Observation of a Space-Time Crystal in a Superfluid Quantum Gas.

@article{Smits2018ObservationOA,
  title={Observation of a Space-Time Crystal in a Superfluid Quantum Gas.},
  author={J. Smits and Lei Liao and H. T. C. Stoof and P. van der Straten},
  journal={Physical review letters},
  year={2018},
  volume={121 18},
  pages={
          185301
        }
}
Time crystals are a phase of matter, for which the discrete time symmetry of the driving Hamiltonian is spontaneously broken. The breaking of discrete time symmetry has been observed in several experiments in driven spin systems. Here, we show the observation of a space-time crystal using ultracold atoms, where the periodic structure in both space and time is directly visible in the experimental images. The underlying physics in our superfluid can be described ab initio and allows for a clear… Expand
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This work provides a simple and pedagogical framework by which to obtain many-body time crystals using parametrically coupled resonators and presents a clear distinction between single-mode time-translation symmetry breaking and a situation where an extensive number of degrees of freedom undergo the transition. Expand
Period-n Discrete Time Crystals and Quasicrystals with Ultracold Bosons.
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  • Physics
  • Science China Physics, Mechanics & Astronomy
  • 2021
Patterns resulted from modulation instability are ubiquitous and have been extensively studied in optics and Bose-Einstein condensates. However, these patterns have not been realized in ultracold… Expand
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