e-QUANET: Embryonic Quantum Network at a telecom wavelength

Project funded by French National Research Agency (ANR), grant ANR-09-BLAN-0333. Participating organisations named by the source: CNRS DELEGATION REGIONALE COTE DAZUR; CNRS DELEGATION REGIONALE COTE D'AZUR; CNRS DELEGATION REGIONALE PARIS A and 1 more. Funded amount: EUR 500,234, as stated by the source. Runs 2009-10-01 to n/a. Source: OpenAIRE Graph, from the funder's project data (collected by OpenAIRE on 2026-07-23); national funding data, not CORDIS. Abstract given by the source: The breakthrough of quantum information turned the fundamental and conceptual property of entanglement into a resource for quantum communication protocols and quantum computational tasks. For instance, entanglement is now at the heart of successful point-to-point quantum cryptography links, but future heads towards more complex networking applications. In this context, telecom photons at 1550 nm represent the natural qubit carriers for distribution through optical fibers, whereas atoms and ions, whose interaction wavelengths are below 900 nm, are more appropriate for storage and computing tasks. Although light-matter interaction should allow switching from one type of carrier to the other, major difficulties remain because of significant mismatches in the operation wavelength and bandwidth. The realization of a quantum network made of interconnected nodes, where storage and computational tasks are possible, essentially depends on the coupling between these different types of qubits. This is currently considered as one of the main challenges quantum communication groups are facing. The e-QUANET consortium is gathering the Laboratoire de Physique de la Matière Condensée (LPMC) in Nice, the Laboratoire de Traitement et Communication de l'Information (LTCI) in Paris, and the Laboratoire Aimé Cotton (LAC) in Orsay. The main goal of our project is to unite complementary skills in order to build a pioneering embryonic quantum network operating at a telecom wavelength, in which generation, distribution, and storage of quantum information are possible. Our experimental scheme is based on interfacing a source of polarization entangled photons emitted at a telecom wavelength, to allow optical fiber transmission, with a narrow bandwidth quantum memory operating around 800 nm. The relevance of our scheme lies in the demonstration that entanglement created by the EPR-source is preserved after having experienced both the quantum interface and the memory storage and read out when [shortened; the full text is on the OpenAIRE page]

Original source.

Source: OpenAIRE Graph: projects of national funders, OpenAIRE, from the project data of French National Research Agency (ANR). Retrieved 2026-10-22. Licence: Creative Commons Attribution 4.0 (OpenAIRE Graph). Selected metadata, adapted presentation; the publisher's record is authoritative. No endorsement by the source is implied. Licence: Creative Commons Attribution 4.0 (CC BY 4.0).

AI-assisted summary: The e-QUANET project, funded by the French National Research Agency with EUR 500,234, focuses on developing a quantum network using telecom wavelengths. It involves multiple CNRS regional delegations and runs from October 1, 2009, with no specified end date. Suggested technology pillar: communication. Generated by AI from the public source text; it may contain errors and the original source is authoritative.