Quantum cloning without signaling

1998/01/06 by Nicolas Gisin, N. Gisin · 5 citations
Computer Science · Mathematics · Physics and Astronomy · #Cloning (programming) #Computer science #Constraint (computer-aided design) #Fidelity #Geometry #Mathematical analysis #Mathematics #Physics #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum channel #Quantum cloning #Quantum entanglement #Quantum information #Quantum mechanics #Quantum nonlocality #Telecommunications #Upper and lower bounds #quant-ph

paper · pdf · doi:10.1016/s0375-9601(98)00170-4

published as Phys.Lett. A242 (1998) 1-3

arxiv created 1998/01/06 · openalex publication_date 1998/05/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

Perfect Quantum Cloning Machines (QCM) would allow to use quantum nonlocality for arbitrary fast signaling. However perfect QCM cannot exist. We derive a bound on the fidelity of QCM compatible with the no-signaling constraint. This bound equals the fidelity of the Bužek-Hillery QCM.

Citations

• A single quantum cannot be cloned
• Quantum copying: Beyond the no-cloning theorem

Cited by

• Testing quantum dynamics using signaling
• Impossibility of creating a superposition of unknown quantum states
• Non-Hermitian Hamiltonians and no-go theorems in quantum information
• Impossibility of cloning of quantum coherence
• Asymmetric broadcasting of quantum correlations