Realization of a deterministic quantum Toffoli gate with a single photon
Shihao Ru, Yunlong Wang, Min An, Feiran Wang, Pei Zhang, Fuli Li · Physical Review A · 2021
Quantum controlled-logic gates, including controlled not gate and Toffoli gate, play critical roles in lots of quantum information processing schemes. We design and experimentally demonstrate deterministic Toffoli gate by utilizing orbital-angular-momentum and polarization degrees of freedom of a single photon. In addition, we generate Bell states by using the controlled not gate. The effective conversion rate of the Toffoli gate in our experiment is $(95.1\ifmmode\pm\else\textpm\fi{}3.2)%$. Furthermore, our experimental setup does not require any auxiliary photons and probabilistic postselections.