Twi-Fi: Enhanced Twin-Field Quantum Key Distribution

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This project focuses on Twin-Field (TF) Quantum Key Distribution (QKD), a recent scheme that enables increased secret key rate and transmission distance for QKD as well as more robust implementation security through the use of an intermediate quantum node and commercially available components. TFQKD has the capability to behave like an effective quantum repeater and cover intercity distances in optical fibre.

The project will address some of the current limitations of TFQKD, increasing its practicality in field trials, making it easier to deploy in existing fibre networks and closer to commercial exploitation. The project also includes research into the physics underlying the TFQKD scheme to better understand and exploit its counter-intuitive properties for quantum communications.