A universal protocol for bidirectional controlled teleportation with network coding  

作　　者：Meng-Yao He Song-Ya Ma Kun-Peng Kang 

机构地区：[1]School of Mathematics and Statistics,Henan University,Kaifeng 475004,China [2]Information Security Center,State Key Laboratory of Networking and Switching Technology,Beijing University of Posts and Telecommunications,Beijing 100876,China [3]Henan Engineering Research Center for Artificial Intelligence Theory and Algorithms,Henan University,Kaifeng 475004,China

出　　处：《Communications in Theoretical Physics》2021年第10期107-113,共7页理论物理通讯（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.61201253,61572246);the Open Foundation of State Key Laboratory of Networking and Switching Technology(Beijing University of Posts and Telecommunications)(Grant No.SKLNST-2020-2-02);the Open Foundation of Guangxi Key Laboratory of Trusted Software(Grant No.KX202040)。

摘　　要：We investigate bidirectional teleportation that works in a fair and efficient manner. Two explicit protocols are proposed to realize bidirectional teleportation with a controller. One is a symmetric protocol for two-qubit states. The other is an asymmetric protocol for single-and two-qubit states. We then devise a universal protocol for arbitrary n_(1)-and n_(2)-qubit states via a(2n_(1)+2n_(2)+1)-qubit entangled state, where n_(1)≤n_(2).The receiver only needs to perform the single-qubit recovery operation, which is derived by a general expression. Moreover, a(2n_(1)+1)-bit classical communication cost can be saved within the controller’s broadcast channel by the use of network coding technology.

关 键 词：bidirectional controlled teleportation network coding projective measurement recovery operation 

分 类 号：O413[理学—理论物理] TN918[理学—物理]