We present a (t, .n) threshold multiparty controlled quantum teleportation protocol of an arbitrary m-qubit quantum state between two remote parties. The unknown m-qubit quantum state can be recovered by the receive...We present a (t, .n) threshold multiparty controlled quantum teleportation protocol of an arbitrary m-qubit quantum state between two remote parties. The unknown m-qubit quantum state can be recovered by the receiver under control of a subset of the n controllers if the number of the subset is larger than or equal to a threshold, say, t, but not for any t - 1 or fewer controllers. Our scheme seems to be more practical and more flexible than other existing protocols. The quantum resource required is just m Einstein-Podolsky-Rosen (EPR) pairs plus some single photons. The techniques required are only Bell state measurement, single-qubit unitary operation and yon Neumann measurement. So our scheme is also feasible with present-day technique.展开更多
利用逆P-集合,提出函数逆P-集合。函数逆P-集合是把函数概念引入到逆P-集合内,改进逆P-集合得到的。函数逆P-集合具有动态特征和规律(函数)特征。函数逆P-集合是由函数内逆P-集合S珔F与函数外逆P-集合S珔F珔构成的函数集合对;或者,(S珔F...利用逆P-集合,提出函数逆P-集合。函数逆P-集合是把函数概念引入到逆P-集合内,改进逆P-集合得到的。函数逆P-集合具有动态特征和规律(函数)特征。函数逆P-集合是由函数内逆P-集合S珔F与函数外逆P-集合S珔F珔构成的函数集合对;或者,(S珔F,珔SF珔)是函数逆P-集合。在一定条件下,函数逆P-集合(S珔F,S珔F珔)被还原成有限普通函数集合S。逆P-集合是把动态特征引入到有限普通集合X内(Cantor set X),改进有限普通集合X被提出的。函数逆P-集合具有与函数P-集合相反的动态特征、规律(函数)特征。本文给出函数逆P-集合的结构、还原和它的函数等价类特征。利用数据拆分-合成原理,给出逆P-信息规律融合与它的生成;给出逆P-信息规律融合的属性特征与属性定理。利用这些结果,给出逆P-信息规律融合生成的隐形信息图像与它的应用。函数逆P-集合与函数P-集合是两个独立的、特征不同的新模型。展开更多
基金Supported by the National Basic Research Program of China (973 Program) under Grant No.2007CB311100the National Natural Science Foundation of China under Grant No.60873191+3 种基金the National High Technology Research and Development Program of China under Grant No.2006AA01Z419the Major Research plan of the National Natural Science Foundation of China under Grant No.90604023the Scientific Research Common Program of Beijing Municipal Commission of Education under Grant No.KM200810005004the Scientific Research Foundation for the Youth of Beijing University of Technology under Grant No.97007016200701
文摘We present a (t, .n) threshold multiparty controlled quantum teleportation protocol of an arbitrary m-qubit quantum state between two remote parties. The unknown m-qubit quantum state can be recovered by the receiver under control of a subset of the n controllers if the number of the subset is larger than or equal to a threshold, say, t, but not for any t - 1 or fewer controllers. Our scheme seems to be more practical and more flexible than other existing protocols. The quantum resource required is just m Einstein-Podolsky-Rosen (EPR) pairs plus some single photons. The techniques required are only Bell state measurement, single-qubit unitary operation and yon Neumann measurement. So our scheme is also feasible with present-day technique.
文摘利用逆P-集合,提出函数逆P-集合。函数逆P-集合是把函数概念引入到逆P-集合内,改进逆P-集合得到的。函数逆P-集合具有动态特征和规律(函数)特征。函数逆P-集合是由函数内逆P-集合S珔F与函数外逆P-集合S珔F珔构成的函数集合对;或者,(S珔F,珔SF珔)是函数逆P-集合。在一定条件下,函数逆P-集合(S珔F,S珔F珔)被还原成有限普通函数集合S。逆P-集合是把动态特征引入到有限普通集合X内(Cantor set X),改进有限普通集合X被提出的。函数逆P-集合具有与函数P-集合相反的动态特征、规律(函数)特征。本文给出函数逆P-集合的结构、还原和它的函数等价类特征。利用数据拆分-合成原理,给出逆P-信息规律融合与它的生成;给出逆P-信息规律融合的属性特征与属性定理。利用这些结果,给出逆P-信息规律融合生成的隐形信息图像与它的应用。函数逆P-集合与函数P-集合是两个独立的、特征不同的新模型。