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arXiv:2512.00753 · Physical Review A

Boosting Gaussian Boson Sampling using Optical Parametric Amplification Networks

Yukuan Zhao, Xiao-Ye Xu, Chuan-Feng Li, Guang-Can Guo

quant-phSubmitted Nov 30, 2025• Announced Dec 2, 2025• 0 citations• Revised May 28, 2026 (v2)
v1 · Nov 30, 2025v2 · May 28, 2026
arXivHTMLPDF

Abstract

Gaussian Boson Sampling (GBS) provides a route toward demonstrating quantum computational advantage. However, optical loss, which reduces the entanglement in the system, can render GBS results classically simulable. We propose a nonlinear photonic architecture based on optical parametric amplifiers (OPAs) arranged in an interferometer network. This active configuration amplifies quantum correlations within the circuit while preserving the #P-hard Hafnian structure of the output probabilities. Using logarithmic negativity, we numerically show that entanglement scales linearly with both the OPA gain and network depth in the lossless limit, and maintains linear scaling with the number of modes under realistic loss rate. These scaling behaviors suggest that classical simulation in lossy scenarios remains computationally intractable. Our results demonstrate that OPA-boosted GBS preserves computational hardness in noisy environments, offering a more effective implementations of near-term photonic quantum computers.

DOI
10.1103/dcfq-1byk
Comments
9+7 pages,6 figures, Comments are welcomed :)

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