2026-07-24T06:01:46Z https://drops.dagstuhl.de/oai

oai:drops-oai.dagstuhl.de:24051 2025-12-12T14:56:06Z ddc:004 open_access

A Quantum Cloning Game with Applications to Quantum Position Verification Colisson Palais, Léo Escolà-Farràs, Llorenç Speelman, Florian Quantum position verification cloning game random oracle parallel repetition We introduce a quantum cloning game in which k separate collaborative parties receive a classical input, determining which of them has to share a maximally entangled state with an additional party (referee). We provide the optimal winning probability of such a game for every number of parties k, and show that it decays exponentially when the game is played n times in parallel. These results have applications to quantum cryptography, in particular in the topic of quantum position verification, where we show security of the routing protocol (played in parallel), and a variant of it, in the random oracle model. Schloss Dagstuhl – Leibniz-Zentrum für Informatik Léo Colisson Palais and Llorenç Escolà-Farràs and Florian Speelman 2025 Is Part Of LIPIcs, Volume 350, 20th Conference on the Theory of Quantum Computation, Communication and Cryptography (TQC 2025) InProceedings Text doc-type:ResearchArticle publishedVersion application/pdf doi:10.4230/LIPIcs.TQC.2025.2 urn:nbn:de:0030-drops-240513 https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.TQC.2025.2 eng https://creativecommons.org/licenses/by/4.0/legalcode