Quantum conference key agreement with photonic graph states

Alessandro Fedrizzi; Joseph Ho

doi:10.1117/12.2616096

9 March 2022 Quantum conference key agreement with photonic graph states

Alessandro Fedrizzi, Joseph Ho

Proceedings Volume PC12015, Quantum Computing, Communication, and Simulation II; PC1201515 (2022) https://doi.org/10.1117/12.2616096
Event: SPIE OPTO, 2022, San Francisco, California, United States

Abstract

Future quantum networks will provide multi-node entanglement enabling secure quantum communication on a global scale. Traditional two-party quantum key distribution (2QKD) consumes pairwise entanglement which is costly in constrained networks. Quantum conference key agreement (QCKA) leverages multipartite entanglement within networks to directly produce identical keys among N users, providing up to N-1 rate advantage over 2QKD. In this contribution I will present work on the implementation of QCKA using photonic GHZ states distributed over telecom fibre of up to 50 km combined length. Furthermore, we implemented QCKA on a constrained network consisting of a 6-qubit photonic graph state on which we apply network coding routines to demonstrate the multi-partite advantage over the two-party paradigm.

Conference Presentation

Citation Download Citation

Alessandro Fedrizzi and Joseph Ho "Quantum conference key agreement with photonic graph states", Proc. SPIE PC12015, Quantum Computing, Communication, and Simulation II, PC1201515 (9 March 2022); https://doi.org/10.1117/12.2616096

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available