Motivated by the recent rapid development of Rydberg atom experiments, in this talk, I will discuss the nonequilibrium time evolution process of a quantum Ising chain subjected to a slowly rotating transverse field and a small longitudinal field. When the longitudinal field is set to zero, the corresponding magnetization oscillations are found to be explained by the contributions from various particle excitations of the quantum E₈ integrable model. When turning on the longitudinal field, a competition between the rotation frequency and the longitudinal field strength leads to a transition between local adiabatic time evolution and many-body Landau-Zener tunneling process. This process is characterized by an effective energy gap arising from the quantum geometric potential and the instantaneous energy gap. I will explain in detail how the quantum geometric potential changes the tunneling behavior as the rotation frequency and longitudinal field strength vary.

Biography

Xiao Wang recently obtained his Ph.D. from the Condensed Matter Division of Tsung-Dao Lee Institute at Shanghai Jiao Tong University, under the supervision of Professor Jianda Wu. His research interests include conformal field theory and integrable models, along with their applications in nonequilibrium systems.

Inviter: Ning Xi