Journal
NATURE PHYSICS
Volume 7, Issue 2, Pages 154-158Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/NPHYS1845
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Funding
- European Research Council (ERC)
- ETHZ
- NSERC
- CIFAR
- Alfred P. Sloan Foundation
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At optical frequencies the radiation produced by a source, such as a laser, a black body or a single-photon emitter, is frequently characterized by analysing the temporal correlations of emitted photons using single-photon counters. At microwave frequencies, however, there are no efficient single-photon counters yet. Instead, well-developed linear amplifiers allow for efficient measurement of the amplitude of an electromagnetic field. Here, we demonstrate first-and second-order correlation function measurements of a pulsed microwave-frequency single-photon source integrated on the same chip with a 50/50 beam splitter followed by linear amplifiers and quadrature amplitude detectors. We clearly observe single-photon coherence in first-order and photon antibunching in second-order correlation function measurements of the propagating fields.
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