Abstract:

We present a general driving protocol for many-body systems to generate a sequence of prethermal regimes, each exhibiting a lower symmetry than the preceding one [1]. We provide an explicit construction of effective Hamiltonians exhibiting these symmetries. This imprints emergent quasi-conservation laws hierarchically, enabling us to engineer the respective symmetries and concomitant orders in nonequilibrium matter. We provide explicit examples, including spatiotemporal and topological phenomena, as well as a spin chain realizing the symmetry ladder SU(2)→U(1)→Z2→E. Based on this framework, we further construct a protocol that leads to emergent massive Nambu–Goldstone quasi-particles with tunable spectral mass gap and lifetime [2]. 

References: [1] arXiv:2402.13519 [2] arXiv:2409.01902

Short Bio:

赵宏政，北京大学物理学院凝聚态所助理教授。2017年于山东大学泰山学堂本科毕业，2021年伦敦帝国理工学院博士毕业，随后两年在德国马克斯-普朗克复杂系统物理研究所从事博士后研究工作，后于2023年底加入北大物理学院。长期从事非平衡多体动力学理论研究，研究兴趣包括量子热化，驱动系统，强关联系统，量子模拟与量子计算。