Operating quantum waveguide circuits with superconducting single-photon detectors
arXiv:1003.4654 · doi:10.1063/1.3413948
Abstract
Advanced quantum information science and technology (QIST) applications place exacting de- mands on optical components. Quantum waveguide circuits offer a route to scalable QIST on a chip. Superconducting single-photon detectors (SSPDs) provide infrared single-photon sensitivity combined with low dark counts and picosecond timing resolution. In this study we bring these two technologies together. Using SSPDs we observe a two-photon interference visibility of 92.3\pm1.0% in a silica-on-silicon waveguide directional coupler at \lamda = 804 nm-higher than that measured with silicon detectors (89.9\pm0.3%). We further operated controlled-NOT gate and quantum metrology circuits with SSPDs. These demonstrations present a clear path to telecom-wavelength quantum waveguide circuits.
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- On-chip, photon-number-resolving, telecom-band detectors for scalable photonic information processing
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- Integrated Photonic Sensing
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- Tomography and state reconstruction with superconducting single-photon detectors
- Proposed Experiment in Two-Qubit Linear Optical Photonic Gates for Maximal Success Rates