Observation of a prethermal discrete time crystal

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Science  11 Jun 2021:
Vol. 372, Issue 6547, pp. 1192-1196
DOI: 10.1126/science.abg8102

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Prethermal time crystal

Characterizing and understanding different phases of matter in equilibrium is usually associated with the process of thermalization, where the system equilibrates. Recent efforts probing nonequilibrium systems have revealed that periodic driving of the system can suppress the natural tendency for equilibration yet still form new, nonequilibrium phases. Kyprianidis et al. used a quantum simulator composed of 25 trapped ion qubits and spins to observe such a nonequilibrium phase of matter: the disorder-free prethermal discrete time crystal. The flexibility and tunability of their quantum simulator provide a powerful platform with which to study the exotic phases of matter.

Science, abg8102, this issue p. 1192

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