Optical Nondestructive Controlled-NOT Gate without Using Entangled Photons

Abstract

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 can not be reproduced by local operations and classical communications.

5 pages, 3 figures, Slight changes have been made, Journal-ref added

References in corpus (3)

• Entangled Photon Pairs from Semiconductor Quantum Dots
• Resource-efficient linear optical quantum computation
• Multiphoton path entanglement by non-local bunching

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• How to simulate a quantum computer using negative probabilities