Topological time crystals

  title={Topological time crystals},
  author={Krzysztof Giergiel and Alexandre Dauphin and Maciej Lewenstein and Jakub J. Zakrzewski and Krzysztof Sacha},
  journal={New Journal of Physics},
By analogy with the formation of space crystals, crystalline structures can also appear in the time domain. While in the case of space crystals we often ask about periodic arrangements of atoms in space at a moment of a detection, in time crystals the role of space and time is exchanged. That is, we fix a space point and ask if the probability density for detection of a system at this point behaves periodically in time. Here, we show that in periodically driven systems it is possible to realize… 

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