Condensed Matter Seminar, Chetan Nayak, Microsoft, "Floquet Time Crystals: Spontaneously Broken Discrete Time-Translational Symmetry in Periodically-D

I will define what it means for time translation symmetry to be spontaneously broken in a quantum system, and show with analytical arguments and numerical simulations that this occurs in a large class of driven systems with discrete time-translation symmetry.