Abstract
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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Acknowledgements
This work was partially supported by CNPq (Grant No. 152722/2016-5), CNPq-Rede Nanobioestruturas, CAPES, FINEP (Federal Brazilian Agencies), and FAPEAL (Alagoas State Agency).
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Almeida, G.M.A., Lyra, M.L. & de Moura, F.A.B.F. Transmission of quantum states through disordered channels with dimerized defects. Quantum Inf Process 18, 350 (2019). https://doi.org/10.1007/s11128-019-2464-6
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DOI: https://doi.org/10.1007/s11128-019-2464-6