N-particles intermediate coordinate-momentum representation and its application

This paper constructs the new common eigenvectors of n intermediate coordinate-momentum operators which are complete and orthonormal. The intermediate coordinate-momentum representation of a multi-particles system is proposed and applied to a generaln-mode quantum harmonic oscillators system with coordinate-momentum coupling.     

有限维奇偶对相干态的非经典性质

构造出了奇偶对相干态的指数形式, 并把奇偶对相干态推广至有限维Hilbert空间, 获得了有限维奇偶对相干态, 然后讨论了它们的正交归一完备性、反聚束效应和相位概率分布. 结果表明, 在此空间中奇偶对相干态具有归一完备性, 但不具有正交性. 借助于数值计算发现, 无论q取何值, 在参数|ξ|的不同取值范围内, 对于5维Hilbert空间中奇偶对相干态在模1和模2两个方向上均可呈现反聚束效应, 并且此双模光场的光子均是相关的. 而在7维Hilbert空间中，奇偶对相干态相位概率分 关键词： 有限维奇偶对相干态 反聚束效应 相位概率分布     

A generalized Hadamard transformation from new entangled state

A new entangled state | eta ;theta rangle is proposed by the technique of integral within an ordered product. A generalized Hadamard transformation is derived by virtue of | eta ;theta rangle , which plays a role of Hadamard transformation for (hat a_1 sin theta - hat a_2 cos theta ) and (hat a_1 cos theta + hat a_2 sin theta ).     

算符(f(“非汉字符号”))~k正交归一本征态的非经典特性

证明了算符 (a^ f(n^) ) k(k≥ 3)的k个正交归一本征态的完备性 ,引入了反聚束效应和一种新的高阶压缩 ,研究了算符 (a^ f(n^) ) k 的k个本征态的反聚束效应和高阶压缩特性 .结果表明 ,这些态可以构成一个完备的希尔伯特(Hilbert)空间 ,它们均可呈现反聚束效应 ,且当k为偶数时它们可呈现M阶 [M =(n +1 2 )k ;n =0 ,1,2 ,… ]压缩效应     

Generation of a new bipartite coherent-entangled state and its applications

A new bipartite coherent-entangled state is introduced in the two-mode Fock space, which exhibits the properties of both a coherent state and an entangled state. The set of coherent-entangled states makes up a complete and partly nonorthogonal representation. A simple experimental scheme to produce the coherent-entangled state using an asymmetric beamsplitter is proposed. Some applications of the coherent-entangled state in quantum optics are also presented.     

复合函数算符的微商法则及其在量子物理中的应用

给出了在量子物理学、量子统计学、算符排序理论、矩阵论以及控制理论中有着重要用途的复合函数算符的一般微分法则,利用这一法则研究了Wigner算符和Weyl对应规则中的积分问题,证明了两类典型的算符恒等公式.给出了Wigner算符的有序算符内的微分形式,并得到了一些重要函数的新的微分式.最后,引入了一个参数型的Wigner算符来统一正规序、Weyl编序以及反正规序三种算符排序.