Generation and sampling of quantum states of light in a silicon chip
Generation and sampling of quantum states of light in a silicon chip
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DOI：
10.1038/s41567-019-0567-8
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发表时间：
2019-09-01
期刊：
影响因子：
19.6
通讯作者：
Laing, Anthony
中科院分区：
文献类型：
--
作者：
Paesani, Stefano;Ding, Yunhong;Laing, Anthony
实现量子算法的大型实例（1-5）需要在一个支持不同组件集成的硬件平台上处理许多量子信息载体(6)。虽然现有的半导体制造工艺可以集成许多光子元件(7)，但许多光子的产生和算法处理一直是集成光子学的瓶颈。在这里，我们报告了在芯片上产生和算法处理最多八个光子的光量子态。我们在集成了线性和非线性光子电路的同一硅芯片上实现了散射（8,9）、高斯（10）和标准玻色子采样（3,11-14）协议。我们使用这些结果来对计算分子振动谱的量子算法进行基准测试(4)。我们的技术可以很容易地扩展到具有数十个光子的专用量子算法的芯片上实现，为传统计算机的效率优势指明了道路（15）。
Implementing large instances of quantum algorithms(1-5) requires the processing of many quantum information carriers in a hardware platform that supports the integration of different components(6). Although established semiconductor fabrication processes can integrate many photonic components(7), the generation and algorithmic processing of many photons has been a bottleneck in integrated photonics. Here, we report the on-chip generation and algorithmic processing of quantum states of light with up to eight photons. Switching between different optical pumping regimes, we implement the scattershot(8,9), Gaussian(10) and standard boson sampling(3,11-14) protocols in the same silicon chip, which integrates linear and nonlinear photonic circuitry. We use these results to benchmark a quantum algorithm for calculating molecular vibronic spectra(4). Our techniques can be readily scaled for the on-chip implementation of specialized quantum algorithms with tens of photons, pointing the way to efficiency advantages over conventional computers(15).