Eternal discrete time crystal beating the Heisenberg limit

@article{Lyu2020EternalDT,
  title={Eternal discrete time crystal beating the Heisenberg limit},
  author={Changyuan Lyu and S. Roy Choudhury and Chenwei Lv and Yangqian Yan and Qi Zhou},
  journal={arXiv: Quantum Gases},
  year={2020},
  volume={2}
}
A discrete time crystal (DTC) repeats itself with a rigid rhythm, mimicking a ticking clock set by the interplay between its internal structures and an external force. DTCs promise profound applications in precision time-keeping and other quantum techniques. However, it has been facing a grand challenge of thermalization. The periodic driving supplying the power may ultimately bring DTCs to thermal equilibrium and destroy their coherence. Here, we show that an all-to-all interaction delivers a… 

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Zhengda Hu, 2, ∗ Xingyu Gao, 2 and Tongcang Li 3, 4, 5, † Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA School of Science, Jiangnan University, Wuxi
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