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

• URL: http://arxiv.org/abs/2603.23604v1
• Date: Tue, 24 Mar 2026 18:00:05 GMT
• Title: Quantum correlations in prepare-and-measure scenarios and their semi-device-independent applications
• Abstract summary: A key aspect in quantum information is to understand the advantage offered by quantum systems over classical ones in communication tasks.<n>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.
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• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: 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.

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