The Peierls distorted chain as a quantum data bus for quantum state transferM. X. Huo1, Ying Li1, Z. Song1 and C. P. Sun1, 2
1 Department of Physics, Nankai University - Tianjin 300071, China
2 Institute of Theoretical Physics, Chinese Academy of Sciences - Beijing 100080, China
received 3 May 2008; accepted in final form 22 September 2008; published November 2008
published online 17 October 2008
We study the quantum state transfer (QST) of an electron spin along the half-filled Peierls distorted chain (PDC). As has been proved, this solvable and feasible gapped model can accomplish a high-fidelity and long-distance QST. Moreover, numerical simulations are performed in and near the non-distortion point which is beyond the range of perturbation. The result shows that the efficiency of the QST is sensitive to the uniform-to-distorted transition of the PDC, which is related to the transition between the conductor and the insulator. Then this scheme can also be employed to probe the conductor-to-insulator transition of the PDC.
03.65.Ud - Entanglement and quantum nonlocality (e.g. EPR paradox, Bell's inequalities, GHZ states, etc.).
75.10.Jm - Quantized spin models.
03.67.Lx - Quantum computation architectures and implementations.
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