Transmission of quantum states through disordered channels with dimerized defects

We study a quantum-state transfer protocol between two end spins of a disordered spin-1/2 chain. We particularly evaluate the performance of the channel when it is subjected to short-range correlated on-site fluctuations. This is implemented by generating a random distribution of dimer-like defects across the chain featuring a given on-site potential W. By numerically evaluating the system’s natural time evolution, we report the possibility of carrying out high-fidelity quantum-state transmission from one end to another given their local frequency is set $$\varepsilon \sim W$$ and W is within the energy band of the defectless chain.

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