报告题目：Time crystal in levitated systems

报 告 人：尹璋琦，金沙总站6165地址交叉信息研究院量子信息中心助理研究员

报告时间：2018-06-29 14:00

报告地点：物理系理科楼C302

报告摘要：Time crystal was proposed in 2012, and got a lot of attentions and disscussions. In 2017, discrete time crystal, which appeared in Floquet driving systems, was realized in time crystal. In this talk, I discuss the concept of time crystal and discrete time crystal, and briefly summarized our proposal of space-time crystal and time quasi-crystal in trapped ions systems. Inspired by this proposal, recently we find that the almost spontaneous dynamics appears near the ground state of Lipkin-Meshkov-Glick (LMG) model with a finite number of spins. We link this phenomena to quantum time crystal and time quasicrystal. Finally, we propose a scheme to realize an effective classical time crystal in an optically levitated charged nanosphere under modest magnetic field. The experimental feasibility is discussed.