Realization of a deterministic quantum Toffoli gate with a single photon

Abstract

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 $(95.1\pm 3.2)\%$. Furthermore, our experimental setup does not require any auxiliary photons and probabilistic post selections.

6 pages, 5 figures, 2tables