Jonathan Lavoie at Xanadu Quantum Technologies in Toronto, Canada, and his colleagues have built a quantum computer called Borealis that uses particles of light, or photons, travelling through a series of fibre-optic loops to solve a problem known as boson sampling, writes Alex Wilkins.

Here is the link: https://www.newscientist.com/article/2322807-advanced-quantum-computer-made-available-to-the-public-for-first-time/