论文标题
开放量子动力学理论自旋松弛理论：应用于$μ$ SR和低场NMR光谱镜
Open Quantum Dynamics Theory of Spin Relaxation: Application to $μ$SR and Low-Field NMR Spectroscopies
论文作者
论文摘要
开放的量子系统是指一个系统，该系统又与可以描述时间不可逆的动力学的环境耦合，该系统通过该动力学向热平衡状态演变而成。我们提出了一种机械严格的理论，以帮助对从高级核磁共振（NMR）和MUON自旋旋转，松弛或共振（$μ$ SR）技术获得的光谱进行分析。我们的方法基于数值“精确”运动（HEOM）方法的“精确”层次方程，该方程使我们能够研究有限温度下的非扰动和非马克维亚系统 - 系统 - 系统 - 系统 - 系统 - 系统 - 甚至在有限的时间依赖性扰动下的减少。我们展示了目前的理论，分析了$μ$ SR和低场NMR光谱，作为库博 - 托亚的理论的扩展，重点是局部磁场的温度和各向异性的影响，以进一步发展这些实验手段。
An open quantum system refers to a system, which is in turn coupled to an environment that can describe time irreversible dynamics through which the system evolves toward the thermal equilibrium state. We present a quantum mechanically rigorous theory in order to help an analysis of spectra obtained from the advanced nuclear magnetic resonance (NMR) and muon spin rotation, relaxation or resonance ($μ$SR) techniques. Our approach is based on the numerically "exact" hierarchical equations of motion (HEOM) approach, which allows us to study the reduced system dynamics for non-perturbative and non-Markovian system-bath interactions at finite temperature even under strong time-dependent perturbations. We demonstrate the present theory to analyze $μ$SR and low-field NMR spectra, as an extension of the Kubo-Toyabe theory focusing on the effects of temperature and anisotropy of a local magnetic field, to help further the development of these experimental means.
