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28 March 2024
 
  » arxiv » 1905.0170

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Experimental Gaussian Boson Sampling
Han-Sen Zhong ; Li-Chao Peng ; Yuan Li ; Yi Hu ; Wei Li ; Jian Qin ; Dian Wu ; Weijun Zhang ; Hao Li ; Lu Zhang ; Zhen Wang ; Lixing You ; Xiao Jiang ; Li Li ; Nai-Le Liu ; Jonathan P. Dowling ; Chao-Yang Lu ; Jian-Wei Pan ;
Date 1 May 2019
AbstractGaussian Boson sampling (GBS) provides a highly efficient approach to make use of squeezed states from parametric down-conversion to solve a classically hard-to-solve sampling problem. The GBS protocol not only significantly enhances the photon generation probability, compared to standard boson sampling with single photon Fock states, but also links to potential applications such as dense subgraph problems and molecular vibronic spectra. Here, we report the first experimental demonstration of GBS using squeezed-state sources with simultaneously high photon indistinguishability and collection efficiency. We implement and validate 3-, 4- and 5-photon GBS with high sampling rates of 832 kHz, 163 kHz and 23 kHz, respectively, which is more than 4.4, 12.0, and 29.5 times faster than the previous experiments. Further, we observe a quantum speed-up on a NP-hard optimization problem when comparing with simulated thermal sampler and uniform sampler.
Source arXiv, 1905.0170
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