排序方式: 共有75条查询结果,搜索用时 156 毫秒
71.
The dependence of fidelity on the squeezing parameter in teleportation of the squeezed coherent statesvglue4pt 下载免费PDF全文
This paper investigates an analytical expression of teleportation fidelity in the teleportation scheme of a single mode of electromagnetic field. The fidelity between the original squeezed coherent state and the teleported one is expressed in terms of the squeezing parameter r and the quantum channel parameter (two-mode squeezed state) p. The results of analysis show that the fidelity increases with the increase of the quantum channel parameter p, while the fidelity decreases with the increase of the squeezing parameter r of the squeezed state. Thus the coherent state (r=0) is the best quantum signal for continuous variable quantum teleportation once the quantum channel is built. 相似文献
72.
散射介质对传统成像的影响非常大,散射严重时甚至使传统成像方式完全失效。如何在存在散射介质的情况下得到高分辨率的图像是人们一直关注的技术。将投影仪应用于关联成像(GI),可以在实验室内实现"街角成像",即利用墙面的漫反射对墙角另一侧无法直接成像的物体进行成像,并在此基础上实现了对隐藏在散射介质后的物体进行成像。该成像方案省去了传统关联成像系统中的参考臂的测量,使用一个无空间分辨能力的桶探测器即可实现。对比实验结果与传统方式得到的结果并分析实验的分辨率以及影响因素,证明了使用投影仪等普通光源在存在散射介质的情况下成像的可行性。 相似文献
73.
Based on the techniques of the quantum remote state preparation via
a deterministic way, this paper proposes a quantum communication
scheme to distribute the secret messages in two phases, i.e., the
carrier state checking phase and the message state transmitting
phase. In the first phase, the secret messages are encoded by the
sender using a stabilizer quantum code and then transmitted to the
receiver by implementing three CNOT gates. In the second phase, the
communicators check the perfectness of the entanglement of the
transmitted states. The messages can be distributed to the receiver
even if some of the transmitted qubits are destroyed. 相似文献
74.
75.
详细介绍了量子密码的相关内容,包括量子密码理论基础、最子保密系统、量子认证系统、量子密码与其他学科的关系以及量子密码的应用与展望,并追踪了量子信息安全系统的最新研究进展。 相似文献