2003/12/16 by Tobias J. Osborne, Noah Linden · 4 citations
Computer Science · Mathematics · Physics and Astronomy · #Computer science #Constant (computer programming) #Fidelity #Limit (mathematics) #Mathematics #Physics #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum entanglement #Quantum information #Quantum information science #Quantum mechanics #Quantum network #Quantum optics and atomic interactions #Quantum teleportation #Qubit #Spin (aerodynamics) #Telecommunications #quant-ph
paper · pdf · doi:10.1103/physreva.69.052315
published as Phys. Rev. A 69, 052315 (2004) · 7 pages, 3 eps figures
arxiv created 2003/12/16 · openalex publication_date 2004/05/14 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
It has been recently suggested that the dynamics of a quantum spin system may provide a natural mechanism for transporting quantum information. We show that one-dimensional rings of qubits with fixed (time-independent) interactions, constant around the ring, allow high-fidelity communication of quantum states. We show that the problem of maximizing the fidelity of the quantum communication is related to a classical problem in Fourier wave analysis. By making use of this observation we find that if both communicating parties have access to limited numbers of qubits in the ring (a fraction that vanishes in the limit of large rings) it is possible to make the communication arbitrarily good.