Pre-thermal phases of matter protected by time-translation symmetry

  title={Pre-thermal phases of matter protected by time-translation symmetry},
  author={Dominic Victor Else and Bela Bauer and C. Nayak},
  journal={arXiv: Statistical Mechanics},
In a periodically driven (Floquet) system, there is the possibility for new phases of matter, not present in stationary systems, protected by discrete time-translation symmetry. This includes topological phases protected in part by time-translation symmetry, as well as phases distinguished by the spontaneous breaking of this symmetry, dubbed "Floquet time crystals". We show that such phases of matter can exist in the pre-thermal regime of periodically-driven systems, which exists generically… 

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