Based on analysis of neighbor-coupled spin chains,a method to get the parameters of the spin chains for perfect information transfer is given,and all analytical solutions are obtained by using Groebner basis analysis.The method is suitable to get the parameters of pulse-driven perfect state control in multilevel chains.The results can be used to analyze structures of the solutions or find particular parameters with optimal properties.

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Perfect Transfer of Entangled States on Spin Chain

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Indian Journal of Physics

Quantum control of quantum information perfect transfer in arbitrary-length spin chain

Qing-Liang Wang, Heng-Feng Ren

Published Sep 15, 2020• 1 citation

Publisher

DOI: 10.1007/s12648-020-01835-y

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spin chains and propose a recursive procedure to construct the nonuniform couplings within these chains of arbitrary length in order to achieve perfect state transfer. We show that this method is capable of finding all possible coupling schemes for perfect state transfer. These schemes, without external control fields, involve analytically identified engineered couplings without the need for dynamical control. The analytical solutions provide all information for coupling design.