Discrete Time Crystals
By D. Else, Christopher R. Monroe, C. Nayak, Norman Y. Yao. Annual Review of Condensed Matter Physics, 2019
338 citations recorded by the source corpus.
Experimental advances have allowed for the exploration of nearly isolated quantum many-body systems whose coupling to an external bath is very weak. A particularly interesting class of such systems is those that do not thermalize under their own isolated quantum dynamics. In this review, we highlight the possibility for such systems to exhibit new nonequilibrium phases of matter. In particular, we focus on discrete time crystals, which are many-body phases of matter characterized by a spontaneously broken discrete time-translation symmetry. We give a definition of discrete time crystals from several points of view, emphasizing that they are a nonequilibrium phenomenon that is stabilized by many-body interactions, with no analog in noninteracting systems. We explain the theory behind several proposed models of discrete time crystals, and compare several recent realizations, in different experimental contexts.
Subfields: Atomic and Molecular Physics, and Optics, Statistical and Nonlinear Physics
View Paper: https://www.semanticscholar.org/paper/c27197e52408e83e9959eb3cba03d2fb98830980
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Citations in the corpus
- Quantum Many-Body Scars: A Quasiparticle Perspective (2022, background): “(175) and (187) propose an intriguing connection between scarring and discrete time crystals (191, 192, 193, 194) that deserves further exploration.”
- Engineered dissipation for quantum information science (2022, background): “These open quantum systems display a similar richness as classical dynamical systems, including limit cycles, period doubling 249–251 , and all of the complexity which is found in actively driven 252 and even living systems 253 .”