%0 Journal Article
%T Remote interactions between two d -dimensional distributed quantum systems: nonlocal generalized quantum control-NOT gate and entanglement swapping<br>Remote interactions between two d-dimensional distributed quantum systems： nonlocal generalized quantum control-NOT gate and entanglement swapping
%A Chen Li-Bing
%A Lu Hong
%A Jin Rui-Bo
%A <br>陈立冰
%A 路洪
%A 金瑞博
%J 中国物理 B
%D 2007
%I 
%X We present a systematic simple method to implement a generalized quantum control-NOT (CNOT) gate on two $d$-dimensional distributed systems. First, we show how the nonlocal generalized quantum CNOT gate can be implemented with unity fidelity and unity probability by using a maximally entangled pair of qudits as a quantum channel. We also put forward a scheme for probabilistically implementing the nonlocal operation with unity fidelity by employing a partially entangled qudit pair as a quantum channel. Analysis of the scheme indicates that the use of partially entangled quantum channel for implementing the nonlocal generalized quantum CNOT gate leads to the problem of `the general optimal information extraction'. We also point out that the nonlocal generalized quantum CNOT gate can be used in the entanglement swapping between particles belonging to distant users in a communication network and distributed quantum computer.
%K nonlocal generalized quantum CNOT gate
%K qudit
%K partially entangled
%K entanglement swapping<br>量子系统
%K 量子纠缠
%K 控制率
%K 交换技术
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=CD8D6A6897B9334F09D8D1648C376FB4&aid=51EC29F0F1FE479647ECB014CA226099&yid=A732AF04DDA03BB3&vid=7801E6FC5AE9020C&iid=708DD6B15D2464E8&sid=921FCEED1EEAD745&eid=6C1B0E5BF8C72A6A&journal_id=1009-1963&journal_name=中国物理&referenced_num=0&reference_num=0