Title: Floquet time crystal (Dr. Long Zhang)

Abstract: In this journal club presentation, I will introduce the notion of "Floquet time crystals", i.e., periodically driven systems that spontaneously break the discrete time translation symmetry, which was theoretically introduced in Ref. [1] and experimentally realized in Refs. [2, 3] (published with a perspective by C. Nayak, Ref [4]).

Reference:

[1] D. V. Else, B. Bauer, and C. Nayak, Phys. Rev. Lett. 117, 90402 (2016).

[2] J. Zhang, P. W. Hess, A. Kyprianidis, P. Becker, A. Lee, J. Smith, G. Pagano, I.-D. Potirniche, A. C. Potter, A. Vishwanath, N. Y. Yao, and C. Monroe, Nature 543, 217 (2017).

[3] S. Choi, J. Choi, R. Landig, G. Kucsko, H. Zhou, J. Isoya, F. Jelezko, S. Onoda, H. Sumiya, V. Khemani, C. von Keyserlingk, N. Y. Yao, E. Demler, and M. D. Lukin, Nature 543, 221 (2017).

[4] C. Nayak, Nature 543, 185 (2017).