Fast and perfect state transfer in superconducting circuit with tunable coupler  

作　　者：张驰 王天乐 赵泽安 杨小燕 郭亮亮 贾志龙 段鹏 郭国平 Chi Zhang;Tian-Le Wang;Ze-An Zhao;Xiao-Yan Yang;Liang-Liang Guo;Zhi-Long Jia;Peng Duan;Guo-Ping Guo(CAS Key Laboratory of Quantum Information,University of Science and Technology of China,Hefei 230026,China;CAS Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum Physics,University of Science and Technology of China,Hefei 230026,China;Origin Quantum Computing Company Limited,Hefei 230026,China)

机构地区：[1]CAS Key Laboratory of Quantum Information,University of Science and Technology of China,Hefei 230026,China [2]CAS Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum Physics,University of Science and Technology of China,Hefei 230026,China [3]Origin Quantum Computing Company Limited,Hefei 230026,China

出　　处：《Chinese Physics B》2023年第11期247-251,共5页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Grant Nos. 12034018 and 11625419)。

摘　　要：In quantum computation and quantum information processing, the manipulation and engineering of quantum systems to suit certain purposes are an ongoing task. One such example is quantum state transfer(QST), an essential requirement for both quantum communication and large-scale quantum computation. Here we engineer a chain of four superconducting qubits with tunable couplers to realize the perfect state transfer(PST) protocol originally proposed in quantum spin networks and successfully demonstrate the efficient transfer of an arbitrary single-qubit state from one end of the chain to the other,achieving a high fidelity of 0.986 in just 25 ns. This demonstrated QST is readily to extend to larger chain and multi-node configurations, thus serving as a desirable tool for scalable quantum information processing.

关 键 词：quantum state transfer superconducting circuit tunable coupler 

分 类 号：O413[理学—理论物理] O511[理学—物理]