Year: 2025
Type: article
Abstract: The quantum prepare-and-measure scenario has been studied under various physical assumptions on the emitted states. Here, we first discuss how different assumptions are conceptually and formally related. We then identify one that can serve as a relaxation of all others, corresponding to a limitation on the one-shot accessible information of the state ensemble. This motivates us to study the optimal state discrimination probability of a source subject to these various physical assumptions. We derive general and tight bounds for states restricted by their quantum dimension, their vacuum component, an arbitrary uniform overlap, the magnitude of higher-dimensional signals and the experimenter's trust in their device. Our results constitute a first step towards a more unified picture of semi-device-independent quantum information processing.
Source: Quantum
Authors: Jef Pauwels, Stefano Pironio, Armin Tavakoli
Language: English
Subfield: Artificial Intelligence
Field: Computer Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $215
Funders: National Science Foundation, National Centres of Competence in Research SwissMAP, European Commission, Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, Fonds De La Recherche Scientifique - FNRS, Fonds Wetenschappelijk Onderzoek, Knut och Alice Wallenbergs Stiftelse, Vetenskapsrådet, QuantERA, HORIZON EUROPE Framework Programme, Wallenberg Center for Quantum Technology, Chalmers University of Technology
Awards: G1747522946, G3617563397, G3928303300, G434337789, G4653766936, Creating highly entangled quantum states in the NISQ era (CHEQS)., Entanglement in quantum communication, G5444244327, Belgian Quantum Communication Testbed Network, G575169067, QuantERA II ERA-NET Cofund in Quantum Technologies, G6251103608, Quantum Secure Networks Partnership
OpenAlex ID: W4407688916