Computing with spins of light

Phys.org  January 21, 2020
In the XY model of a spin system used for solving complex problems particles form vortex-like patterns around multiple focal points. An international team of researchers (Japan, USA -Stanford University) improved an experimental set up that emulates the XY model by designing a laser system that generates pulses of light particles within a one-kilometer-long optical fiber cavity. The pulses generated 5,000 spins, i.e. flows of light particles going down 5,000 different drains, within the cavity. It enabled long simulations over several minutes within a stable system. This improves on previous oscillators that produced only 100 spins and simulation times that were limited to several tens of milliseconds. The team demonstrated the spinning light particles within the optical fiber cavity accurately correspond to an XY model… read more. Open Access TECHNICAL ARTICLE

Credit: fisher4/123rf

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