SECRET – SECuRe quantum communication based on Energy-Time/time-bin entanglement

Project funded by Swedish Research Council (Project grant), grant 2019-00392_VR. Participating organisations named by the source: Linköping University. Funded amount: SEK 1,428,030, as stated by the source. Runs 2020-01-01 to 2022-12-31. Keywords: Naturvetenskap, Natural Sciences, Fysik, Physical Sciences, Atom- och molekylfysik och optik, Atom and Molecular Physics and Optics. Source: OpenAIRE Graph, from the funder's project data (collected by OpenAIRE on 2025-12-04); national funding data, not CORDIS. Abstract given by the source: Quantum entanglement is an important resource in quantum communications (QC), having applications in communication security and in protocols supporting future networks of quantum computers, the so-called Quantum Internet. A particularly important type of photonic entanglement well suited for long-distance propagation is called energy-time (ET). The downside has been that most experimental implementations employ the famous “Franson’s configuration”, which has an inherent flaw called the post-selection loophole that invalidates a Bell inequality violation. All members of the consortium behind this application have been responsible for proposing and carrying out the first, and so far only performed, QC experiments based on ET entanglement that do not present this post-selection flaw. This project now aims to carry out the first generation of genuine energy-time/time-bin experiments aimed at final, practical applications. We intend to perform, based post-selection loophole-free first: (i) QKD and (ii) entanglement swapping/teleportation experiments. Furthermore, our project will also perform the first implementations of QKD with genuine energy-time entanglement on integrated photonic circuits, as well as strong theoretical analysis on the post-selection loophole in these new experiments. The results proposed will form an important experimental and theoretical framework to support the future development of the Quantum Internet based on the telecommunication optical fibre network.

Original source.

Source: OpenAIRE Graph: projects of national funders, OpenAIRE, from the project data of Swedish Research Council. 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 project "SECRET" focuses on quantum communication using energy-time entanglement, funded by the Swedish Research Council with a grant of SEK 1,428,030. It runs from January 1, 2020, to December 31, 2022, involving Linköping University. Suggested technology pillar: communication. Generated by AI from the public source text; it may contain errors and the original source is authoritative.