Overcoming noise limitations in quantum key distribution with quantum privacy amplification
High-quality, distributed entanglement forms the foundation for the unequaled level of security that can be assured in quantum key distribution (QKD), but its susceptibility to noise hinders practical implementations. This study experimentally demonstrates that enhancing quantum resources with quantum privacy amplification (QPA) increases the noise resilience of QKD beyond classical limits. Leveraging hyperentanglement in different field-tested degrees of freedom of a photon pair increases the efficiency of QPA, thereby unlocking its advantage for QKD. Here is a method to generate secure keys under noisy conditions, which was previously impossible, paving the way for robust QKD.
Authors
- Rupert Ursin (ORCID: https://orcid.org/0000-0002-9403-269X)
- Sebastian Ecker (ORCID: https://orcid.org/0000-0002-7597-741X)
- Martin Bohmann (ORCID: https://orcid.org/0000-0003-3857-4555)
- Lukas Bulla (ORCID: https://orcid.org/0000-0002-7978-3110)
- Philipp Sohr (ORCID: https://orcid.org/0000-0002-8865-6164)
Institutions
- University of Vienna (AT)
- Austrian Academy of Sciences (AT)
- TU Wien (AT)
- Institute for Quantum Optics and Quantum Information Innsbruck (AT)
- Vienna Center for Quantum Science and Technology (AT)
- Quantum Technology Sciences (United States) (US)
Publication Details
- Journal
- Physical Review Applied
- Published
- 2024-08-21
- DOI
- https://doi.org/10.1103/physrevapplied.22.024059
- Citations
- 5
- Primary Topic
- Quantum Information and Cryptography
- Type
- article
- Field-Weighted Citation Impact
- 1.74
Funders
- Austrian Science Fund
- Horizon 2020 Framework Programme