1
talks
0
committee roles
0
leadership roles
2024–2024
years active
Contributions
QIP QCrypt TQC presenter award · △program ◇steering ○organising □local · filled = chair
Talks
| Title | Conference | Type | Co-authors |
|---|---|---|---|
| Twin Field Quantum Key Distribution Across National Scale Telecommunication Infrastructure | QCRYPT 2024 | regular | Mirko Pittaluga, Yuen San Lo, Adam Brzosko, Robert I Woodward, Matthew S. Winnel, Thomas Roger, James Dynes, Piotr Rydlichowski, Guy Roberts, Andrew Shields |
Quantum Communications (QC) harness quantum mechanical phenomena such as superposition and entanglement to enhance information transfer between remote nodes. Coherent quantum communications refer to QC schemes relying on maintaining optical coherence between nodes for successful execution. These schemes typically involve single photon interference between optical fields generated by distant parties and represent a cornerstone of a promising architecture of the quantum internet. Despite their significant potential, scientific and technical hurdles - including optical coherence maintenance, integrating high-performance single-photon detectors, and precise stabilisation and synchronisation - have prevented the implementation of coherent QC over existing telecommunication infrastructure. Here we present the first realisation of a coherent QC fully integrated into standard telecommunication infrastructure over a link connecting the German cities of Frankfurt and Kehl. The implemented scheme is the Twin Field Quantum Key Distribution (QKD) protocol, enabling the distribution of a shared secret key for encryption at a rate of 110 bit/s over a highly asymmetric 254 km link. This result, obtained with a system featuring measurement-device-independent properties, marks the longest installed QKD implementation utilising non-cryogenic cooled detectors and was enabled by the QC system architecture we developed and by our approach to phase stabilisation, which involves active out-of-band phase stabilisation and avalanche photodiodes for single photon detection. This achievement, not only represents a milestone for practical quantum communications but also validates the compatibility of coherent QC with current telecommunication infrastructure, supporting the feasibility of a phase-based architecture for the quantum internet. |
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Collaborators
| Co-author | Joint talks |
|---|---|
| Adam Brzosko | 1 |
| Andrew Shields | 1 |
| Guy Roberts | 1 |
| James Dynes | 1 |
| Matthew S. Winnel | 1 |
| Mirko Pittaluga | 1 |
| Piotr Rydlichowski | 1 |
| Robert I Woodward | 1 |
| Thomas Roger | 1 |
| Yuen San Lo | 1 |