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We systematically study the transfer of quantum state of electron spin as theflying qubit along a half-filled Peierls distorted tight-binding chaindescribed by the Su-Schrieffer-Heeger (SSH) model, which behaves as a quantumdata bus. This enables a novel physical mechanism for quantum communicationwith always-on interaction: the effective hopping of the spin carrier betweensites $A$ and $B$ connected to two sites in this SSH chain can be induced bythe quasi-excitations of the SSH model. As we prove, it is the Peierls energygap of the SSH quasi-excitations that plays a crucial role to protect therobustness of the quantum state transfer process. Moreover, our observationalso indicates that such a scheme can also be employed to explore the intrinsicproperty of the quantum system.Comment: 10 pages, 6 figure

The Peierls distorted chain as a quantum data bus for quantum state transfer