论文标题
旋转玻色子模型的隐藏阶段
The Hidden Phase of the Spin-Boson Model
论文作者
论文摘要
浸入亚欧马浴体验中的量子两级系统增强了低频量子统计波动，从而使非平衡量子动力学高度非马克维亚语。在使用数值精确的时变矩阵产品运算符方法后，我们研究了极化动力学的相图。除了阻尼相干振荡动力学的已知阶段和衰变过度衰减外，我们还确定了相图中的一个新的第三个区域，用于强耦合，以显示上性耦合行为。我们确定相应的相边界。这里的量子两态系统的动力学本身不是连贯的，而是奴役的振荡浴动力学。
A quantum two-level system immersed in a sub-Ohmic bath experiences enhanced low-frequency quantum statistical fluctuations which render the nonequilibrium quantum dynamics highly non-Markovian. Upon using the numerically exact time-evolving matrix product operator approach, we investigate the phase diagram of the polarization dynamics. In addition to the known phases of damped coherent oscillatory dynamics and overdamped decay, we identify a new third region in the phase diagram for strong coupling showing an aperiodic behaviour. We determine the corresponding phase boundaries. The dynamics of the quantum two-state system herein is not coherent by itself but slaved to the oscillatory bath dynamics.
