Efficient Quantum Information Transfer through a Uniform Channel

Nanomaterials and Nanotechnology

Ruggero Vaia¹  Tony J. G. Apollaro¹  Leonardo Banchi¹  Alessandro Cuccoli¹  Paola Verrucchi¹ 

关键词: spin chains;    dynamics;    quantum channels;    entanglement;   

DOI  :  10.5772/50947

来源: InTech

【 摘 要 】

Effective quantum-state and entanglement transfer can be obtained by inducing a coherent dynamics in quantum wires with homogeneous intrawire interactions. This goal is accomplished by optimally tuning the coupling between the wire endpoints and the two qubits there attached. A general procedure to determine such value is devised, and scaling laws between the optimal coupling and the length of the wire are found. The procedure is implemented in the case of a wire consisting of a spin-1/2 XY chain: results for the time dependence of the quantities which characterize quantum-state and entanglement transfer are found of extremely good quality also for very long wires. The present approach does not require engineered intrawire interactions nor a specific initial pulse shaping, and can be applied to a vast class of quantum channels.

【 授权许可】

Unknown