Condensed matter physics in time crystals
@article{Guo2020CondensedMP, title={Condensed matter physics in time crystals}, author={Lingzhen Guo and Pengfei Liang}, journal={New Journal of Physics}, year={2020}, volume={22} }
Time crystals are physical systems whose time translation symmetry is spontaneously broken. Although the spontaneous breaking of continuous time-translation symmetry in static systems is proved impossible for the equilibrium state, the discrete time-translation symmetry in periodically driven (Floquet) systems is allowed to be spontaneously broken, resulting in the so-called Floquet or discrete time crystals. While most works so far searching for time crystals focus on the symmetry breaking…
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