Jin Xianmin, a quantum communication researcher with Shanghai Jiaotong University, checks a photonic quantum chip in Shanghai, east China, May 15, 2018. Chinese scientists demonstrated the first two-dimensional quantum walks of single photons in real spatial space, which may provide a powerful platform to boost analog quantum computing. They reported in a paper published in the journal Science Advances a three-dimensional photonic chip with a scale up to 49-multiply-49 nodes, by using a technique called femtosecond direct writing. (Xinhua/Ding Ting)
