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研究了基于无相互作用测量的反事实量子通信方案。利用组合型马赫-曾德尔(M-Z)干涉仪对引入物体实现无相互作用测量,并利用其实现反事实通信,也即未借助实物粒子的信息传输。在弱相干场作为光源的情况下,从系统输出端的测量结果分析了组合型M-Z干涉仪一臂作为逻辑门的开关特性。通过对系统中大M-Z干涉仪和小M-Z干涉仪的个数选取,相应改变系统内部光学分束器的反射率,进而影响了两输出端口探测器所接收的光强之比。文章中给出了详细的理论推导过程。
The counterfactual quantum communication scheme based on the non-interaction measurement is studied. The combined Mach-Zehnder interferometer is used to measure the non-interaction of the introduced objects and to use it to realize the counter-factual communication, that is, the information transmission without using the physical particles. In the case of weak coherence field as light source, the measurement results of the output of the system analyzes the switching characteristics of the combined M-Z interferometer with one arm as a logic gate. By choosing the number of large M-Z interferometer and small M-Z interferometer in the system, the reflectivity of the optical beam splitter in the system is changed accordingly, which affects the ratio of the light intensity received by the two output port detectors. The article gives a detailed theoretical derivation process.