Abstract

We study the appearance of Exceptional Points in a hybrid system composed of a superconducting flux-qubit and an ensemble of nitrogen-vacancy colour centres in diamond. We discuss the possibility of controlling the generation of Exceptional Points, by the analysis of the model space parameters. One of the characteristic features of the presence of Exceptional Points, is the departure from the exponential decay behaviour of the observables as a function of time. We study the time evolution of different initial states, in the presence of the hybrid system, by computing the reduced density matrix of each subsystem. We present the results we have obtained for the steady behaviour of different observables. We analyse the appearance of Squeezed Spin States and anti-Squeezed Spin States.

Graphical abstract

中文翻译：

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混合物理系统的哈密顿量的极好点：挤压和反挤压

摘要

我们研究了由超导通量量子位和钻石中氮空位色心的集合组成的混合系统中异常点的出现。我们通过分析模型空间参数来讨论控制例外点生成的可能性。异常点的存在的特征之一是随时间的变化而偏离了可观测对象的指数衰减行为。我们通过计算每个子系统的密度降低矩阵，研究了存在混合系统的情况下不同初始状态的时间演化。我们介绍了针对不同可观察物的稳定行为所获得的结果。我们分析了压缩自旋态和反压缩自旋态的外观。

图形概要