Multichip multidimensional quantum networks with entanglement retrievability

Abstract

Quantum networks provide the framework for quantum communication, clock synchronization, distributed quantum computing, and sensing. Implementing large-scale and practical quantum networks relies on the development of scalable architecture and integrated hardware that can coherently interconnect many remote quantum nodes by sharing multidimensional entanglement through complex-medium quantum channels. We demonstrate a multichip multidimensional quantum entanglement network based on mass-manufacturable integrated-nanophotonic quantum node chips fabricated on a silicon wafer by means of complementary metal-oxide-semiconductor processes. Using hybrid multiplexing, we show that multiple multidimensional entangled states can be distributed across multiple chips connected by few-mode fibers. We developed a technique that can efficiently retrieve multidimensional entanglement in complex-medium quantum channels, which is important for practical uses. Our work demonstrates the enabling capabilities of realizing large-scale practical chip-based quantum entanglement networks.

Editor’s summary

The realization of a scalable quantum entanglement network relies on the development of a scalable architecture and on incorporating hardware components that are mass manufacturable. Zheng et al . proposed and demonstrated a scalable architecture using photonic hybrid multiplexing. They realized a toolbox of integrated nanophotonic hybrid multiplexing devices that can be manufactured using standard industrial fabrication processes. Their chip-based quantum entanglement network could find important applications in quantum communications, metrology, and distributed quantum computing. —ISO

Abstract

A multichip quantum network was realized using silicon-photonic hybrid multiplexing technology.