Realizing an entanglement-based multi-user quantum network with integrated photonics

Abstract

Quantum network facilitates the secure transmission of information between different users. Establishing communication links among multiple users in a scalable and efficient way is important for realizing a large-scale quantum network. Here we develop an energy-time entanglement-based dense wavelength division multiplexed network based on an integrated silicon nitride micro-ring resonator, which offers a wide frequency span (covering at least the entire C-band) and narrow bandwidth modes (~ 650MHz). Six pairs of photons are selected to form a fully and simultaneously connected four-user quantum network. The observed quantum interference visibilities are well above the classical limits among all users. Each pair of users perform the BBM92 protocol for quantum key distribution. Our results pave the way for realizing large-scale quantum networks with integrated photonic architecture.

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• Recent advances in high-dimensional mode-locked quantum frequency combs
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• All-Photonic Quantum Repeater for Multipartite Entanglement Generation
• Coexistence of multiuser entanglement distribution and classical light in optical fiber network with a semiconductor chip
• Experimental Measurement-Device-Independent Quantum Cryptographic Conferencing
• A robust approach for time-bin encoded photonic quantum information protocols
• Quantum Teleportation from Telecom Photons to Erbium-ion Ensembles
• Entanglement distribution over 155 km metropolitan fiber using a CMOS-compatible silicon chip
• An Integrated Photon-Pair Source with Monolithic Piezoelectric Frequency Tunability
• Entanglement distribution over metropolitan fiber using an on-chip broadband polarization entangled photon source
• Discrete and parallel frequency-bin entanglement generation from quantum frequency comb
• Entanglement Structure Certification Based on Energy-Restricted State Discrimination
• Photonic quantum information with time-bins: Principles and applications