Methods for a linear optical quantum Fredkin gate

2008/04/07 by Yan-Xiao Gong, Guang-Can Guo, Guang‐Can Guo +1 · 5 citations
Computer Science · Engineering · Physics and Astronomy · #Computer science #Controlled NOT gate #Optoelectronics #Photonic and Optical Devices #Physics #Quantum #Quantum Information and Cryptography #Quantum computer #Quantum gate #Quantum mechanics #Quantum optics and atomic interactions #quant-ph

paper · pdf · doi:10.1103/physreva.78.012305

published as Phys. Rev. A 78, 012305 (2008) · 5 pages, 5 figures

arxiv created 2008/04/07 · openalex publication_date 2008/07/02 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We consider the realization of a quantum Fredkin gate with only linear optics and single photons. First we construct a heralded Fredkin gate using four heralded controlled-NOT (CNOT) gates. Then we simplify this method to a post-selected one utilizing only two CNOT gates. We also give a possible realization of this method which is feasible with current experimental technology. Another post-selected scheme requires time entanglement of the input photons but needs no ancillary photons.

Citations

• Experimental quantum teleportation of a two-qubit composite system
• Experimental demonstration of five-photon entanglement and open-destination teleportation
• Experimental entanglement of six photons in graph states
• Conservative logic

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