IQubitNet SIGNED

Project "IQubitNet" data sheet

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 Partnership

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 Project objective

The rapidly advancing field of quantum technologies promises to solve important problems in computation, communication and metrology. A long-sought goal is the realization of quantum networks to distribute entanglement to long distance nodes. Such a network could enable the implementation of distributed quantum computing, unconditionally secure communication, ultra-precise distributed clocks, and precision sensors such as ultra-long-baseline interferometers. While ground-breaking demonstrations have been reported using NV centers in diamond, scaling up the performance and range will require key advances in suppressing photon loss, extending decoherence, and multiplexing and packaging deployable quantum repeater nodes. In this project, we propose to investigate the promising spin and optical properties of Group-IV color centers in diamond coupled to nanocavity interfaces, and to scale these Cavity-QED systems to multiple quantum memories individually addressable on photonic integrated circuits (PICs). The multiplexed quantum repeater devices that we propose will combine highly efficient optical interfaces with logical qubit of extended coherence. Moreover, these repeater nodes can be efficiently connected over long distance through existing metropolitan-scale fiber networks by quantum frequency conversion to the telecom band. As a specific goal, we aim to demonstrate that such quantum repeaters will be able to beat the rate-loss scaling of repeaterless (memoryless) quantum links, enabling a new generation of multi-node quantum networking application.