Criterion and flexibility of operation difficulty for perfect teleportation of arbitrary n-qutrit state with (n:n)-qutrit pure state  

作　　者：ZHANG ZiYun LIU YiMin ZHANG Wen ZHANG ZhanJun 

机构地区：[1]Key Laboratory of Optoelectronic Information Acquisition & Manipulation of Ministry of Education of China, School of Physics & Material Science, Anhui University, Hefei 230039, China [2]Department of Physics, Shaoguan University, Shaoguan 512005, China [3]School of Physics & Material Science, Anhui University, Hefei 230039, China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2011年第8期1476-1480,共5页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the Specialized Research Fund for theDoctoral Program of Higher Education (Grant No. 20103401110007);the National Natural Science Foundation of China (Grant Nos. 10975001,10747146, 10874122 and 11074001);the Talent Foundation of High Education of Anhui Province for Outstanding Youth (Grant No. 2009SQRZ018);the 211 Project of Anhui University

摘　　要：Under the preconditions that a (n:n)-qutrit pure state is taken as the quantum channel to teleport an arbitrary n-qutrit state and the sender is able to perform generalized-Bell-state measurements and publish the results, the necessary transformation operation in the receiver's site is worked out in terms of the technique of swapping states. A criterion on whether such quantum channel can be utilized for perfect teleportation is derived by virtue of the unitarity of the resultant transformation operator. Moreover, the flexibility between the measurement difficulty and the reconstruction difficulty is shown and discussed.Under the preconditions that a （n：n）-qutrit pure state is taken as the quantum channel to teleport an arbitrary n-qutrit state and the sender is able to perform generalized-Bell-state measurements and publish the results, the necessary transformation operation in the receiver’s site is worked out in terms of the technique of swapping states. A criterion on whether such quantum channel can be utilized for perfect teleportation is derived by virtue of the unitarity of the resultant transformation operator. Moreover, the flexibility between the measurement difficulty and the reconstruction difficulty is shown and discussed.

关 键 词：quantum teleportation CRITERION transformation operator generalized Bell-state measurement 

分 类 号：O431.2[机械工程—光学工程] O413[理学—光学]