September 2019

Artist’s view of an atom chip in NASA’s Cold Atom Laboratory, a space-based project that’s exploring new science for quantum sensors. [NASA/JPL-Caltech]

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New measuring devices exploit the extreme sensitivity of quantum states—but making them practical is a challenge.

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Exploring and extending the promise of quantum technologies requires the ability to work with single quantum objects—especially photons. Here’s a look at the range of single-photon-source technologies available, and how and where they work.

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On-chip silicon photonics technology is enabling smaller, cheaper, better distance-ranging sensors to realize safe, ubiquitous vehicle automation and more.

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