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A chip-scale single-photon SWAP gate as integrated interface between polarization and spatial-momentum qubits

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Abstract

We demonstrate a single-photon SWAP gate between polarization and spatial momentum on a SOI chip. 19.8% error ratio is obtained, and phase coherence of the SWAP operation is measured via single photon interference with up to 58.7% visibility.

© 2017 Optical Society of America

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