Qubit(s) transfer in helical spin chains

Verma H., Chotorlishvili L., Berakdar J., and Mishra S.K.

Europhysics Letters 119, pp 30001 (2017)

Qubit(s) transfer through a helical chain is studied. We consider the transfer of a single state and Bell states across a multiferroic spin chain and the possibility of an electric-field control of the fidelity of the single state and the Bell pairs. We analyze pure and imperfect multiferroic spin chains. A scheme for an efficient transfer of spin states through a multiferroic channel relies on kicking by appropriate electric-field pulses at regular intervals. This electric-field pulse sequence undermines the effect of impurity on the fidelity and improves the state transfer through the helical chain.

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