Simulating complex networks in phase space: Gaussian boson sampling

Understand

We show how phase-space simulations of Gaussian quantum states in a photonic network permit verification of measurable correlations of Gaussian boson sampling (GBS) quantum computers.

• Our results agree with experiments for up to 100-th order correlations, provided decoherence is included.
• We extend this to more than 16,000 modes, and describe how to simulate genuine multipartite entanglement.