Effect of Spin-Orbit Interaction and Input State on Quantum Discord and Teleportation of Two-Qubit Heisenberg Systems  

作　　者：QIN Meng ZHAI Xiao-Yue CHEN Xuan LI Yan-Biao WANG Xiao BAI Zhong 秦猛;翟孝月;陈宣;李延标;王晓;白忠(Institute of Science,PLA University of Science and Technology,Nanjing 211101)

机构地区：[1]Institute of Science,PLA University of Science and Technology,Nanjing 211101

出　　处：《Chinese Physics Letters》2012年第3期25-28,共4页中国物理快报（英文版）

基　　金：Supported by the Pre-research Foundation of PLA University of Science and Technology;the Youth Foundation of Institute of Science(No QN-SL-2010-01).

摘　　要：We study the quant.um discord and teleportation of a two-qubit Heisenberg XXX chain with spin-orbit interaction.The analytical expressions of quantum discord,output state quantum discord and fidelity are obtained for this model The classical correlation,quantum correlation and entanglement of this system depending on coupling interaction,spin-orbit interaction and temperature are investigated in detail It is found that the quantum discord exists for the ferromagnetic case,but entanglement is zero under the same condition.We can obtain fidelity better than any classical communication protocol for the antiferromagnetic case.The robustness of quantum discordagainst the temperature is helpful for the realization of quantum computation.

关 键 词：interaction COMPUTATION QUANTUM 

分 类 号：O41[理学—理论物理]