Spin chain model for correlated quantum channels

Details Spin chain model for correlated quantum channels Spin chain model for correlated quantum channels

2008-05-28

arxiv.org/abs/0805.4277v1

New J. Phys. 10, 115009 (2008)

Physics

Quantum Physics

15 pages, 8 figures

Scientific paper

10.1088/1367-2630/10/11/115009

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.

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