利用热平衡态超导电荷量子比特实现量子隐形传态  

Quantum teleportation using superconducting charge qubits in thermal equilibrium

作　　者：乔盼盼[1] 艾合买提·阿不力孜[1] 蔡江涛[2] 路俊哲[1] 麦麦提依明·吐孙[1] 日比古·买买提明[1] 

机构地区：[1]新疆师范大学物理与电子工程学院,乌鲁木齐830054 [2]中国科学院半导体研究所,半导体超晶格国家重点实验室,北京100083 Xinjiang Normal Univ, Sch Phys & Elect Engn, Urumqi 830054, Peoples R China; Chinese Acad Sci, State Key Lab Superlattices & Microstruct, Inst Semicond, Beijing 100083, Peoples R China

出　　处：《物理学报》2012年第24期30-36,共7页Acta Physica Sinica

基　　金：教育部科学技术研究重点项目(批准号:212193);新疆师范大学研究生科技创新基金(批准号:20121213);新疆维吾尔自治区理论物理重点学科研究生科技创新项目(批准号:LLWLY201103);新疆维吾尔自治区自然科学基金(批准号:2012211A052)资助的课题~~

摘　　要：本文利用处于热平衡态的两个相同超导电荷量子比特纠缠态作为量子隐形传态的信道,给出标准量子隐形传态协议下传递单量子比特态和两量子比特态的纠缠以及非标准协议下传递单量子比特态时平均保真度的解析表达式,研究其随温度、约瑟夫森能等系统参数的变化情况.计算结果表明,在标准量子隐形传态协议下传递两量子比特之间的纠缠以及非标准量子隐形传态协议下传递单量子比特态时可以实现接近理想的量子隐形传态.Is this paper we mainly investigate the effects of the temperature and Josephson energy on teleportation of one qubit state in both the standard and the non-standard protocols as well as the partial teleportation of an entangled state under the standard protocol via two identical superconducting charge qubits in thermal equilibrium as the teleportation channel, and give the analytical expression of the average fidelity. Our results show that the teleportation of one qubit state in non-standard protocol and the partial teleportation of entanglement in standard protocol can be almost perfect, indicating that quantum teleportation, with using superconducting charge qubits in thermal equilibrium as a quantum channel, is feasible in theory.

关 键 词：超导电荷量子比特 量子隐形传态 平均保真度 

分 类 号：O413[理学—理论物理]