论文标题
使用Lindbladian方法通过相关的相阻尼和振幅阻尼噪声通道在两个耦合的核自旋中建模反应性
Using a Lindbladian approach to model decoherence in two coupled nuclear spins via correlated phase-damping and amplitude damping noise channels
论文作者
论文摘要
在这项工作中，我们研究了两个耦合核自旋系统中不同顺序相干的放松动力学。我们使用了以前设计的模型来用于此类系统中的固有噪声，该模型考虑了Markovian放松的Lindblad Master方程。我们在几个两旋链系统中实验创建了零，单量子和双量子相干，并进行了完整的状态断层扫描和计算的状态保真度。我们通过实验测量了这些系统中零和双量子相干的衰减。实验数据很好地拟合到一个模型，该模型认为主噪声通道是相关的相阻尼通道，同时在两次旋转上与一般性振幅阻尼通道一起在两种旋转上独立作用。多量器相干的差异松弛可以归因于同时在两个自旋上同时作用的相关相阻尼通道的作用。
In this work, we studied the relaxation dynamics of coherences of different order present in a system of two coupled nuclear spins. We used a previously designed model for intrinsic noise present in such systems which considers the Lindblad master equation for Markovian relaxation. We experimentally created zero-, single- and double- quantum coherences in several two-spin systems and performed a complete state tomography and computed state fidelity. We experimentally measured the decay of zero- and double- quantum coherences in these systems. The experimental data fitted well to a model that considers the main noise channels to be a correlated phase damping channel acting simultaneously on both spins in conjunction with a generalized amplitude damping channel acting independently on both spins. The differential relaxation of multiple-quantum coherences can be ascribed to the action of a correlated phase damping channel acting simultaneously on both the spins.
