论文标题
与自旋对系统不同的放松动力学
Relaxation dynamics of an unlike spin pair system
论文作者
论文摘要
与室温下的旋转不同，Redfield主方程用于研究相互作用对的集合的动力学。该自旋量子系统是一个工作台量子模型，可分析通过纯偶极偶极偶联相互作用的异核两级自旋系统的弛豫动力学。计算了密度矩阵元素的表达式及其每个相干顺序的松弛速率常数。此外，考虑了三个初始量子状态，对解决方案进行了评估，理论预测（例如多指数的演变和增强）是解决方案保留并同意以前对磁化时间演变进行的研究的行为。此外，用于预测纵向磁化的动力学计算的解决方案避免了I.所罗门报告的分歧。
Redfield master equation was applied to study the dynamics of an ensemble of interacting pairs of unlike spins at room temperature. This spin quantum system is a workbench quantum model to analyze the relaxation dynamics of a heteronuclear two-level spin system interacting by a pure dipole-dipole coupling. Expressions for the density matrix elements and their relaxation rate constants of each coherence order were computed. In addition, the solutions were evaluated considering three initial quantum states, and the theoretical predictions, such as multi-exponential evolutions and enhancement, are behaviors that the solutions preserve and agree with previous studies performed for magnetization time evolutions. Moreover, the solutions computed to predict the dynamics of the longitudinal magnetization avoid the disagreement reported by I. Solomon.
