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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±3.2)%. Furthermore, our experimental setup does not require any auxiliary photons and probabilistic postselections.
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Ru et al. (2021) studied this question.
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