He Yu, Ding X, Su Z-E, Huang H-L, Qin J, Wang C, Unsleber S, Chen C, Wang H, He Y-M, Wang X-L, Zhang W-J, Chen S-J, Schneider C, Kamp M, You L-X, Wang Z, Höfling S, Lu Chao-Yang, Pan Jian-Wei
Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.
CAS-Alibaba Quantum Computing Laboratory, CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Shanghai 201315, China.
Phys Rev Lett. 2017 May 12;118(19):190501. doi: 10.1103/PhysRevLett.118.190501. Epub 2017 May 10.
Boson sampling is a problem strongly believed to be intractable for classical computers, but can be naturally solved on a specialized photonic quantum simulator. Here, we implement the first time-bin-encoded boson sampling using a highly indistinguishable (∼94%) single-photon source based on a single quantum-dot-micropillar device. The protocol requires only one single-photon source, two detectors, and a loop-based interferometer for an arbitrary number of photons. The single-photon pulse train is time-bin encoded and deterministically injected into an electrically programmable multimode network. The observed three- and four-photon boson sampling rates are 18.8 and 0.2 Hz, respectively, which are more than 100 times faster than previous experiments based on parametric down-conversion.
玻色子采样是一个人们坚信经典计算机难以处理的问题，但可以在专门的光子量子模拟器上自然地得到解决。在此，我们首次使用基于单个量子点 - 微柱器件的高度不可区分（约94%）的单光子源实现了时间编码玻色子采样。该方案对于任意数量的光子仅需要一个单光子源、两个探测器和一个基于环路的干涉仪。单光子脉冲序列进行时间编码并被确定性地注入到一个电可编程多模网络中。观测到的三光子和四光子玻色子采样率分别为18.8赫兹和0.2赫兹，这比之前基于参量下转换的实验快了100多倍。
