Optical Nondestructive Controlled-NOT Gate without Using Entangled Photons
Xiao‐Hui Bao, Teng‐Yun Chen, Qiang Zhang, Jian Hua Yang, Han Zhang, Tao Yang, Jian-Wei Pan · Physical Review Letters · 2007
We present and experimentally demonstrate a novel optical nondestructive controlled-NOT gate without using entangled ancilla. With much fewer measurements compared with quantum process tomography, we get a good estimation of the gate fidelity. The result shows a great improvement compared with previous experiments. Moreover, we also show that quantum parallelism is achieved in our gate and the performance of the gate cannot be reproduced by local operations and classical communications.