期刊
NATURE COMMUNICATIONS
卷 11, 期 1, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/s41467-020-16187-8
关键词
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资金
- Engineering and Physical Sciences Research Council (EPSRC) Hub in Quantum Computing and Simulation [EP/T001062/1]
- European Commission QUCHIP (H2020-FETPROACT-3-2014: quantum simulation)
- QUPIC
- European Research Council (ERC)
- University of Trento's strategic initiative Q@TN
- European Union's Horizon 2020 research and innovation programme [820405]
- EPSRC [EP/N003470/1]
- EPSRC [EP/T001062/1, EP/N003470/1] Funding Source: UKRI
While integrated photonics is a robust platform for quantum information processing, architectures for photonic quantum computing place stringent demands on high quality information carriers. Sources of single photons that are highly indistinguishable and pure, that are either near-deterministic or heralded with high efficiency, and that are suitable for mass-manufacture, have been elusive. Here, we demonstrate on-chip photon sources that simultaneously meet each of these requirements. Our photon sources are fabricated in silicon using mature processes, and exploit a dual-mode pump-delayed excitation scheme to engineer the emission of spectrally pure photon pairs through inter-modal spontaneous four-wave mixing in low-loss spiralled multi-mode waveguides. We simultaneously measure a spectral purity of 0.99040.0006, a mutual indistinguishability of 0.987 +/- 0.002, and >90% intrinsic heralding efficiency. We measure on-chip quantum interference with a visibility of 0.96 +/- 0.02 between heralded photons from different sources.
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