That’s why researchers at Canadian quantum computing hardware and software startup Xanadu are backing an alternative quantum computing approach based on optics, which was long discounted as impractical. In a paper published last week in Nature, they unveiled the first fully programmable and scalable optical chip that can run quantum algorithms. Not only does the system run at room temperature, but the company says it could scale to millions of qubits.
In a recent paper in Nature, the group describes a chip made up of 56 interferometers—components that allow the researchers to control how beams of light interfere with each other to carry out mathematical operations.
The processor can be reprogrammed by applying a small voltage to the waveguides that direct beams of light around the processor, which heats them and causes them to change shape.
The chip is best suited to inference tasks, the researchers say, where the algorithm is put to practical use by applying a learned model to analyze new data, for instance to detect objects in an image.
https://singularityhub.com/2017/06/20/deep-learning-at-the-speed-of-light-on-nanophotonic-chips/
Optiset prosessorit toimivat valon nopeudella. Optisista prosessoreista on haaveiltu vuosikymmenien ajan. Tälläkin alalla on edetty mutta hitaasti.
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