Complete structural restoring of transferred multi-qubit quantum state
arXiv:2104.13762 · doi:10.1016/j.physleta.2021.127605
Abstract
We develop the protocol for structural restoring of multi-quantum coherence matrices of the multi-qubit quantum state transferred from the sender to the receiver along a spin-1/2 chain. We also propose a protocol for constructing such 0-order coherence matrix that can be perfectly transferred in this process. The restoring protocol is based on the specially constructed unitary transformation of the extended receiver.{This transformation for a given length parameters of the chain is universally optimal in the sense that ones constructed it can be applied to optimally restore any higher-order coherence matrices.
arXiv comment28 pages, 2 figure
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