Spin chain model for correlated quantum channels

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.

15 pages, 8 figures

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Cited by in corpus (8)

• Quantum channels and memory effects
• Master equations for correlated quantum channels
• Enhancement of transmission rates in quantum memory channels with damping
• Master equation for cascade quantum channels: a collisional approach
• Memory effects in attenuation and amplification quantum processes
• Teleportation-Induced Correlated Quantum Channels
• Transmission of classical and quantum information through a quantum memory channel with damping
• New Phase Transitions in Optimal States for Memory Channels