Spin chain model for correlated quantum channels

2008/05/28 by Davide Rossini, Vittorio Giovannetti, Simone Montangero
Computer Science · Physics and Astronomy · #Amplitude damping channel #Chain (unit) #Channel (broadcasting) #Classical capacity #Coupling (piping) #Criticality #Entropy (arrow of time) #Fidelity #Physics #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum channel #Quantum information #Quantum mechanics #Quantum network #Spin (aerodynamics) #Statistical physics #Telecommunications #Thermodynamics #cond-mat.other #quant-ph

paper · pdf · doi:10.1088/1367-2630/10/11/115009

published as New J. Phys. 10, 115009 (2008) · 15 pages, 8 figures

arxiv created 2008/05/28 · openalex publication_date 2008/11/20 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We analyze the quality of the quantum information transmission along a correlated quantum channel by studying the average fidelity between input and output states and the average output purity, giving bounds for the entropy of the channel. Noise correlations in the channel are modeled by the coupling of each channel use with an element of a one-dimensional interacting quantum spin chain. Criticality of the environment chain is seen to emerge in the changes of the fidelity and of the purity.

Citations

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