2010/08/31 by Giulio Chiribella, G. Chiribella, Vittorio Giovannetti +5 · 1 citation
Computer Science · Mathematics · Physics and Astronomy · #Algorithm #Channel (broadcasting) #Clock synchronization #Communication source #Computer network #Computer science #ENCODE #Frame (networking) #Mathematics #Physics #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum channel #Quantum entanglement #Quantum mechanics #Quantum teleportation #Reference frame #State (computer science) #Superdense coding #Synchronization (alternating current) #Teleportation #Theoretical computer science #Topology (electrical circuits) #quant-ph
paper · pdf · doi:10.1103/physreva.86.010304
published as Phys. Rev. A 86, 010304(R) (2012) · 5 pages, no figures, published version
openalex publication_date 2012/07/19 · arxiv created 2012/07/25 · arxiv updated 2012/07/26 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We show that a quantum clock can not be teleported without prior synchronization between sender and receiver: every protocol using a finite amount of entanglement and an arbitrary number of rounds of classical communication will necessarily introduce an error in the teleported state of the clock. Nevertheless, we show that entanglement can be used to achieve synchronization with precision higher than any classical correlation allows, and we give the optimized strategy for this task. The same results hold also for arbitrary continuous quantum reference frames, which encode general unspeakable information, information that can not be encoded into a number, but instead requires a specific physical support, such as a clock or a gyroscope, to be conveyed.