Demonstration of 8-Step Single-Photon Quantum Walk using 32 × 32 Reconfigurable Silicon Photonics Switch

We implemented a reconfigurable quantum-walk circuit on a 32×32 silicon photonics switch system. The 1 to 8-step quantum walk exhibited a long-term stability over 45 hours with clear single-photon interference for 10-nm-bandwidth heralded single photons.