非平衡凝固法制备金属间化合物SbSn的表面结构

锡-锑系统的研究由于其重要的的理论意义和应用价值而受到重视，但是各个相图之间并不是完全一致的。大部分对于金属间化合物SbSn的研究集中在平衡态，对于金属间化合物SbSn的结构研究尚存在着一些不同的看法，对于锡锑的相图和金属间化合物SbSn的晶体结构还需要进一步的研究。     

基于集成门电路的单稳态 触发器设计原理

本文对单稳态触发器的设计原理进行了研究.根据单稳态触发器工作特点的要求, 以 RC 电路为定 时单元,利用微分电路及“信号静态竞争冒险”等信号瞬变现象,并结合信号反馈存贮的原理, 阐明单稳态 触发器的设计思想.这有利于对单稳态触发器工作原理在本质上的理解, 同时为无稳态触发器、多值单稳 态触发器等的研究提供了理论依据     

两种间接测量TTL与非门参量的方法

对两种非对称式TTL与非门多谐振范器进行了分析，提出了两种间接测量TTL与非门参量的方法。并对它们的可尾性进行了实验验证。     

Scheme for N-Qubit Toffoli Gate by Transport of Trapped Ultracold Ions

We propose a potentially practical scheme for implementing an n-qubit Toffoli gate by elaborately controlling the transport of ultracold ions through stationary laser beams. Conditioned on the uniform ionic transport velocity, the n-qubit Toffoli gate can be realized with high fidelity and high successful probability under current experimental conditions, which depends on a single resonant interaction with n trapped ions and has constant implementation time with the increase of qubits. We show that the increase of the ion number can improve the fidelity and the successful probability of the Toffoli gate.     

A Proposal of Telecloning for a Three-Particle Entangled?W?State

A 1→2 telecloning solution for an arbitrary three-particle entangled W state is proposed in which two four-particle entangled states are used as quantum channels. It is proposed that the three-particle W state can be telecloned based on the quantum teleportation and the local copying of entanglement, and the fidelity of each clone depends on the input state. This scheme can be generalized into the case of 1→N (N>2) telecloning of an arbitrary three-particle W state. Furthermore, another scheme for 1→N (N≥2) telecloning of an arbitrary n-particle (n≥4) W state is proposed, the multi-bit controlled-NOT (CNOT) gates and additional particles are needed in this case. Project 10574060 supported by the National Natural Science Foundation of China.     

人工土壤冻结过程的计算机模拟

针对用液氮或液态CO2对建筑物地基实施冻结处理的相变传热问题，进行了计算机数值模拟研究。相变导热方程采用了显热容法进行分析处理。采用自编程序对单管冻结速度、土壤容积含水率的影响和冷冻管布置方式的优化等问题进行了计算研究。最后针对某一实际工程应用给出了冷冻管布置的优化方案。     

利用二粒子部分纠缠态实现开靶目标的非局域量子可控非（CNOT）门的受控操作

提出利用二粒子部分纠缠态概率性地实现开靶目标的非局域量子可控非（CNOT）门的操控方案.首先考虑利用3个二粒子部分纠缠态实现3个靶目标共享的非局域量子CNOT门的受控操作,然后将该方案推广到N个靶目标共享的情形. 在该方案中,控制端Alice的局域正定算符值测量（POVM）起着关键作用,给出了该测量算符的数学表式.值得注意的是, 用二粒子部分纠缠态可确定性地实现非局域CNOT门. 关键词： 二粒子部分纠缠态 非局域可控非门 开靶目标 正定算符值测量     

一个二次冻胀的数学模型

In this paper a new mathematical model of secondary frost heave is presented. It isexpected that the problem considered under some assumptions is well-posed.     

Second Quantization Representation of Quantum Logic Gate Transformations

By using the theory of multimode linear transformation in Fock space, we offer an effective method to study the quantum logic gates based on fermion states. The forms of some basic quantum logic operations are also obtained.     

LGC五种熔点标准物质的定值

介绍英国政府化学家研究所（LGC）研制的五种熔点标准物质的熔点和凝固点的定值方法、定值结果及不确定度的估计。