Robust state transfer and entanglement distribution in the quantum spin channel via non-Hermitian operation

Abstract

Using the non-Hermitian operation approach, robust state transfer and entanglement distribution can be realized in the quantum spin chain channel. We derive the exact analytical expressions of the quantum fidelity and entanglement and in detail investigate the influence of non-Hermitian operator parameters on the quantum fidelity and entanglement. Compared with pure decoherence process (without non-Hermitian operator process), we find that the non-Hermitian operator process can obvious enhance and preserve the quantum fidelity and entanglement.