Gaussian Boson Sampling for Quantum Computational Advantage | Chao-Yang Lu | KeynoteTalk

The main challenge for scaling up photonic quantum technologies is the lack of perfect quantum light sources.
We have pushed the parametric down-conversion to its physical limit and produced a two-photon source with simultaneously a collection efficiency of 97% and indistinguishability of 96% between independent photons. Using a single quantum dot in microcavities, we have produced on-demand single photons with high purity, near-unity indistinguishability, and high extraction efficiency—all combined in a single device compatibly and simultaneously. Based on the high-performance quantum light sources, we have implemented boson sampling—which is an intermediate model of quantum computing, a strong candidate for demonstrating quantum computational advantage and refuting the Extended Church Turing Thesis—with up to 76 photon clicks after a 100-mode interferometer. The photonic quantum computer, Jiuzhang, yields an output state space dimension of 10^30 and a sampling rate that is 10^14 faster using the state-of-the-art simulation strategy on supercomputers.

For more updates visit our website or follow us on social media platforms,