Archive > Volume 12 Issue 5 > 2016,12(5):395-397. DOI:10.1007/s11801-016-6149-4 CSTR:[cstr] Prev Next
Nearly deterministic quantum Fredkin gate based on weak cross-Kerr nonlinearity
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Abstract:
A scheme of an optical quantum Fredkin gate is presented based on weak cross-Kerr nonlinearity. By an auxiliary coherent state with the cross-Kerr nonlinearity effect, photons can interact with each other indirectly, and a non-demolition measurement for photons can be implemented. Combined with the homodyne detection, classical feedforward, polarization beam splitters and Pauli-X operations, a controlled-path gate is constructed. Furthermore, a quantum Fredkin gate is built based on the controlled-path gate. The proposed Fredkin gate is simple in structure and feasible by current experimental technology.
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