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排序方式: 共有948条查询结果,搜索用时 0 毫秒
841.
YANG Wan-Li WEI Hua CHEN Chang-Yong 《理论物理通讯》2008,50(11):1117-1122
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. 相似文献
842.
Li-Hua Yan Yun-Feng Gao Jian-Gang Zhao 《International Journal of Theoretical Physics》2009,48(8):2445-2453
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. 相似文献
843.
844.
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 相似文献
845.
GuanZhicheng YangYiqing 《高校应用数学学报(英文版)》2001,16(4):369-376
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. 相似文献
846.
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. 相似文献
847.
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。 相似文献
848.
The linear isopiestic relation has been used together with a well-known thermodynamic equation to establish a new predictive equation for freezing point depression. This equation can provide predictions for multicomponent solutions conforming to the linear isopiestic relation using only information on the corresponding binary subsystems. The predictive capability of the equation has been tested by comparing with the experimental data at 25°C reported in the literature and particularly those of Pathwardhan and Kumar. The systems used are NaCl—MgCl2—H2O, NaCl—BaCl2—H2O, NaCl—CaCl2—H2O, LiCl—NaCl—H2O, LiCl—KCl—H2O, LiCl—CsCl—H2O, NaCl—KCl—H2O, and NaBr—KBr—H2O. The predictions of the two equations agree well with the experimental data although our new equation is, in general, better. 相似文献
849.
Chirantan Gayen Upashi Goswami Kasturi Gogoi Srestha Basu Anumita Paul 《Chemphyschem》2019,20(7):953-958
Herein, we report the construction of intracellular logic operations using luminescent histidine stabilized gold nanoclusters (His Au NCs). The luminescence intensity of His Au NCs was found to be significantly enhanced following interaction with zinc ions, owing to “Crystallization induced emission enhancement”. Further, the luminescence intensity of His Au NCs was found to be effectively quenched in presence of sulphide ions, owing to transformation of emissive His Au NCs to non-emissive gold nanoparticles. Thus, the collective and individual effects of zinc ions and sulphide ions causing significant variation in the luminescence intensity of His Au NCs, were used as input parameters for construction of intracellular logic operations such as Tri state buffer, “on-off” switch and INHIBIT gate within mammalian cells. 相似文献
850.
铁电材料作为感光功能薄膜的红外器件研究近年来十分活跃,其良好的压电、铁电、热释电、光电及非线性光学特性以及能够与半导体工艺相集成等特点,在微电子和光电子技术领域有着广阔的应用前景。实验将铁电材料锆钛酸铅作为感光层与GaN基高电子迁移率晶体管(HEMT)相结合,成功地制备出了感光栅极GaN基HEMT器件,并在波长为365 nm的光照下进行探测,经大量实验测试后发现器件在该波段的光照下饱和电流达到28 mA,相比无光照时饱和电流提高12 mA。另外,通过合理改变器件结构尺寸,包括器件栅长以及栅漏间距,发现随着栅长的增大,器件的饱和输出电流依次减小,而栅漏间距的变化对阈值电压以及饱和电流的影响并不大。由此可知,改变器件结构参数可以达到提高器件性能的目的并且可以提高探测效率。 相似文献