摘要
We study the possibility of using a spin chain to construct a quantum entanglement channel that can be used for quantum state transmission in a solid state system.We analyze the spin chain's states under various z-directional magnetic field and spin interactions to determine the entanglement between Alice and Bob's spins.We derive the conditions under which this entanglement can be distilled,and find that a spin chain of arbitrary length can be used as a quantum channel for quantum state transmission when the number of spin flips in the chain is large.
作者
张少良
杜良辉
郭光灿
周幸祥
周正威
ZHANG Shao-Liang;DU Liang-Hui;GUO Guang-Can;ZHOU Xing-Xiang;ZHOU Zheng-Wei(Key Laboratory of Quantum Information,University of Science and Technology of China,Hefei 230026)
基金
Supported by the National Basic Research Program of China under Grant No 2011CB921204
the National Natural Science Foundation of China under Grant Nos 60921091,10874170 and 10875110
the Research Fund for the Doctoral Program of Higher Education of China under Grant No 20103402110024
the K.C.Wong Education Foundation,Hong Kong.
