Slow Dynamics and Aging in a Quantum Spin Glass Coupled to Quantum Internal Environment and an External AC Field

摘要

The low-temperature dynamic behavior of a glassy disordered quantum system located in an external oscillating field and coupled to the internal quantum surroundings (thermal bath of quantum harmonic oscillators) is considered. The effect of extrinsic and intrinsic parameters (such as the amplitude and frequency of the external field, the quantum tunneling parameter, the "exchange" constant, and the constant of coupling of the system to the bath) is studied. It is shown that the symmetrized autocorrelation function and the linear response function of the system exhibit slow dynamics and aging effect.