| Title: |
Quantum cryptography integrating an optical quantum memory |
| Authors: |
Mamann, Hadriel; Nieddu, Thomas; Hoffet, Félix; Bozzio, Mathieu; Garreau de Loubresse, Félix; Kerenidis, Iordanis; Diamanti, Eleni; Urvoy, Alban; Laurat, Julien |
| Contributors: |
Laboratoire Kastler Brossel (LKB Collège de France ); Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS); École normale supérieure - Paris (ENS-PSL); Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL); Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS); Information Quantique LIP6 (QI); LIP6; Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) |
| Source: |
ISSN: 2375-2548 ; Science Advances ; https://hal.science/hal-05029566 ; Science Advances , 2025, 11 (38), pp.eadx3223. ⟨10.1126/sciadv.adx3223⟩. |
| Publisher Information: |
CCSD; American Association for the Advancement of Science (AAAS) |
| Publication Year: |
2025 |
| Subject Terms: |
[PHYS.QPHY]Physics [physics]/Quantum Physics [quant-ph]; [PHYS.PHYS.PHYS-GEN-PH]Physics [physics]/Physics [physics]/General Physics [physics.gen-ph] |
| Description: |
International audience ; Developments in scalable quantum networks rely critically on optical quantum memories, which are key components enabling the storage of quantum information. These memories play a pivotal role for entanglement distribution and long-distance quantum communication, with remarkable advances achieved in this context. However, optical memories have broader applications, and their storage and buffering capabilities can benefit a wide range of future quantum technologies. Here we present the first demonstration of a cryptography protocol incorporating an intermediate quantum memory layer. Specifically, we implement Wiesner's unforgeable quantum money primitive with a storage step, rather than as an on-the-fly procedure. This protocol imposes stringent requirements on storage efficiency and noise level to reach a secure regime. We demonstrate the implementation with polarization encoding of weak coherent states of light and a high-efficiency cold-atom-based quantum memory, and validate the full scheme. Our results showcase a major capability, opening new avenues for quantum memory utilization and network functionalities. |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| Relation: |
info:eu-repo/semantics/altIdentifier/arxiv/2504.00094; ARXIV: 2504.00094; INSPIRE: 2906820 |
| DOI: |
10.1126/sciadv.adx3223 |
| Availability: |
https://hal.science/hal-05029566; https://hal.science/hal-05029566v1/document; https://hal.science/hal-05029566v1/file/2504.00094v1.pdf; https://doi.org/10.1126/sciadv.adx3223 |
| Rights: |
https://about.hal.science/hal-authorisation-v1/ ; info:eu-repo/semantics/OpenAccess |
| Accession Number: |
edsbas.EF5F0D23 |
| Database: |
BASE |