Quantum uncertainty relations of quantum coherence and dynamics under amplitude damping channel

In this paper, we discuss quantum uncertainty relations of quantum coherence through a different method from Ref. [52]. Some lower bounds with parameters and their minimal bounds are obtained. Moreover, we find that for two pairs of measurement bases with the same maximum overlap, quantum uncertainty relations and lower bounds with parameters are different, but the minimal bounds are the same. In addition, we discuss the dynamics of quantum uncertainty relations of quantum coherence and their lower bounds under the amplitude damping channel(ADC). We find that the ADC will change the uncertainty relations and their lower bounds, and their tendencies depend on the initial state.     

Sufficient Conditions of the Same State Order Induced by Coherence

In this paper, we study coherence-induced state ordering with Tsallis relative entropy of coherence, relative entropy of coherence and l1 norm of coherence, and give the sufficient conditions of the same state order induced by above coherence measures. First, we show that the above measures give the same ordering for single-qubit states in some special cases. Second, we consider some special states in a d-dimensional quantum system. We show that the above measures generate the same ordering for these special states. Finally, we discuss dynamics of coherence-induced state ordering under Markovian channels. We find amplitude damping channel changes the coherence-induced ordering even though for single-qubit states with fixed mixedness.     

模糊剩余自动机

在[0,1]格值区间上引入了模糊剩余自动机(FRFA)的概念:若一个模糊自动机(FFA)的每一个状态都定义了其接受语言的一个剩余语言,则称为模糊剩余自动机.讨论了模糊剩余自动机的一些性质以及模糊自动机的消去与饱和运算.在定义既约模糊剩余语言的基础上定义了标准模糊剩余自动机,并给出了构造方法.证明了一个模糊正则语言对应的标准FRFA即为识别这个语言的最小状态FFA,此研究为模糊自动机的状态最小化研究提供了另一种研究思路.