恒元物理学讲座（第051期）：Quantum critical dynamics at finite temperatures

讲座内容：

Describing the nonequilibrium quantum critical phenomena at finite temperatures is a great challenge in condensed matter physics [1], since the interplay between the long-ranged quantum and thermal fluctuations. None of analytic, semiclassical and effective numerical methods yields accurate results for dynamics in the quantum critical regime. In our work, the Lindblad equation is proposed to describe the nonequilibrium scaling behavior near the quantum critical point at finite temperatures. We show that the dissipation rate is an additional indispensible scaling variable in the quantum critical dynamics at finite temperatures [2]. The scaling theory is verified in both driven critical dynamics [2] and relaxation critical dynamics [3].

[1] S. Sachdev and B. Keimer, Phys. Today 64(2), 29 (2011),

[2] S. Yin, P. Mai and F. Zhong, Phys. Rev. B, 89, 094108 (2014),

[3] S. Yin, C. Lo, and P. Chen, in preparation