Cluster states prepared by using hot trapped ions

We propose a scheme for the preparation of one-dimensional and two-dimensional cluster states by using hot trapped ions. The scheme is based on the interaction between two ions and bichromatic radiation. The vibrational mode in our protocol is only virtually excited so that the system is insensitive to the thermal field. In addition, we only use two levels of ions as qubits and the successful probability may achieve 100%.     

业务双活数据中心网络设计要点探讨

在分析企业IT系统建设双活数据中心必要性的基础上,分析云虚拟机级别跨数据中心迁移对大二层网络的需求与实现,进而探讨业务级别的双活数据中心两种技术实现方案,网络对全局业务监控检查及可用性感知能力的要求,业务协同调度机制以及企业双活数据中心前端应用网络的设计要点.     

利用Raman型的Jaynes-Cummings模型传送光场的福克叠加态

提出了一种利用Λ型三能级原子与光场Raman相互作用来传送光场的福克叠加态的方案.     

IT系统可用性影响因素分析与对策

在分析IT系统应用架构和流程运作的基础上,从各个层面对电信企业IT系统的可用性影响因素进行了分析,有针对性地提出了相应的技术实现和加强管理的对策,这对降低电信企业关键IT系统计划外宕机出现的概率是非常必要的。     

基于Siebel的CRM系统高可用性架构设计和性能提升研究

客户关系治理(CRM)系统是支持电信企业以客户为中心业务运作的一项关键应用,其系统本身的可用性和性能调优非常重要,直接关系到用户的业务体验。文章在分析了电信企业基于Siebel的CRM系统架构的基础上,研究如何综合利用相关成熟技术,以较低的成本和复杂性,设计出具备高可用性、可扩展性的CRM系统基础体系结构。这样,既能消除CRM系统架构中的单点故障隐患,还能根据业务发展平滑地扩展系统能力,达到优化提升CRM系统整体性能的目的。     

Scheme for the implementation of 1→3 optimal phase-covariant quantum cloning in ion-trap systems

This paper proposes a scheme for the implementation of 1→ 3 optimal phase-covariant quantum cloning with trapped ions. In the present protocol, the required time for the whole procedure is short due to the resonant interaction, which is important in view of decoherence. Furthermore, the scheme is feasible based on current technologies.     

VPDN用户远程接入细粒度安全控制

在分析企业VPDN(虚拟专用拨号网)用户远程接入所引入安全风险的基础上,提出VPDN用户远程接入安全访问精细控制的解决方案,即在用户分类和身份认证的基础上,LNS(L2TP〔第二层隧道协议〕网络服务器)根据AAA(认证、授权、记账)服务器所返回的特定RADIUS(远程认证拨号用户服务)属性值,按用户所属组别不同分配不同地址池(段)的IP地址,在企业网边界防火墙设置不同IP地址段可访问的企业网络内部主机应用资源的权限,既能满足用户VPDN远程网络接入需求,又能达到细粒度网络安全访问控制要求。     

V型原子与光场拉曼相互作用传送未知原子态

未知量子态从一个地方到另一个地方的隐形传送在量子信息领域中有非常重要的作用,提出了一种利用简并V型三能级原子与振幅很大的单模相干态腔场的拉曼相互作用来传送未知原子态的方案。     

Probabilistic teleportation of an arbitrary three-particle state

A scheme for teleporting an arbitrary and unknown three-particle state from a sender to either one of two receivers is proposed. The quantum channel is composed of a two-particle non-maximally entangled state and two three-particle non-maximally entangled W states. An arbitrary three-particle state can be perfectly teleported probabilistically if the sender performs three generalized Bell-state measurements and sends to the two receivers the classical result of these measurements, and either one of the two receivers adopts an appropriate unitary transformation conditioned on the suitable measurement outcomes of the other receiver. All kinds of unitary transformations are given in detail.