Quantum correlations in prepare-and-measure scenarios and their semi-device-independent applications

Quantum Physics [Submitted on 24 Mar 2026] Quantum correlations in prepare-and-measure scenarios and their semi-device-independent applications Jonatan Bohr Brask, Nicolas Brunner, Jef Pauwels, Davide Rusca, Armin Tavakoli A key aspect in quantum information is to understand the advantage offered by quantum systems over classical ones in communication tasks. In recent years, a fundamental approach to this problem has been developed, focusing on quantum correlations in prepare-and-measure scenarios. Inspired by the developments in Bell nonlocality and device-independent information processing, this line of research aims to characterize the possibilities and limits of quantum systems for communication, in particular to precisely capture the advantage they offer over classical systems. In addition to fundamental insights, these ideas also underpin the concept of semi-device-independent quantum information processing. Exploring trade-offs between security, performance and ease-of-implementation, this approach opens promising directions for novel quantum information processing technologies and devices. A number of protocols and proof-of-principle demonstrations have been reported in recent years, in particular for quantum randomness certification and key distribution. Here, we provide a comprehensive introduction to quantum prepare-and-measure correlations and semi-device independent applications. Comments: 12 pages, 6 figures, 2 tables Subjects: Quantum Physics (quant-ph) Cite as: arXiv:2603.23604 [quant-ph]   (or arXiv:2603.23604v1 [quant-ph] for this version)   https://doi.org/10.48550/arXiv.2603.23604 Focus to learn more Submission history From: Jef Pauwels [view email] [v1] Tue, 24 Mar 2026 18:00:05 UTC (496 KB) Access Paper: HTML (experimental) view license Current browse context: quant-ph < prev   |   next > new | recent | 2026-03 References & Citations INSPIRE HEP NASA ADS Google Scholar Semantic Scholar Export BibTeX Citation Bookmark Bibliographic Tools Bibliographic and Citation Tools Bibliographic Explorer Toggle Bibliographic Explorer (What is the Explorer?) Connected Papers Toggle Connected Papers (What is Connected Papers?) Litmaps Toggle Litmaps (What is Litmaps?) scite.ai Toggle scite Smart Citations (What are Smart Citations?) Code, Data, Media Demos Related Papers About arXivLabs Which authors of this paper are endorsers? | Disable MathJax (What is MathJax?)