Quantum Physics
[Submitted on 2 Jun 2021 (v1), last revised 7 Jul 2022 (this version, v3)]
Title:Cracking the Quantum Advantage threshold for Gaussian Boson Sampling
View PDFAbstract:Scientists in quantum technology aspire to quantum advantage: a computational result unattainable with classical computers. Gaussian boson sampling experiment has been already claimed to achieve this goal. In this setup squeezed light states interfere in a mid-sized linear optical network, where multi-photon collisions take place. The exact simulation of the counting statistics of $n$ threshold detectors is far beyond the possibilities of modern supercomputers once $n$ exceeds $100$. Here we challenge quantum advantage for a mid-sized Gaussian boson sampling setup and propose the approximate algorithm to obtain the probability of any specific measurement outcome. For an 70-mode device on a laptop, our approximation achieves accuracy competitive with the experimental one.
Submission history
From: Alexey Rubtsov N. [view email][v1] Wed, 2 Jun 2021 20:05:46 UTC (1,636 KB)
[v2] Tue, 21 Dec 2021 18:36:39 UTC (1,168 KB)
[v3] Thu, 7 Jul 2022 16:17:38 UTC (1,434 KB)
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