The quantum telebroadcasting of a cat-like state in combination with the quantum teleportation and the local copying of entanglement is presented. This gives a general way of distributing entanglement among distant pa...The quantum telebroadcasting of a cat-like state in combination with the quantum teleportation and the local copying of entanglement is presented. This gives a general way of distributing entanglement among distant parties. All of the operations of our scenario are local and within the reach of current technology.展开更多
We investigate the violation of two types of Leggett-Garg(LG)inequalities in self-assembled quantum dots under the stationarity assumption.By comparing the two types of LG inequalities,we find the better one that is e...We investigate the violation of two types of Leggett-Garg(LG)inequalities in self-assembled quantum dots under the stationarity assumption.By comparing the two types of LG inequalities,we find the better one that is easier to be tested in an experiment.In addition,we show that the fine-structure splitting,background noise and temperature of quantum dots greatly affect the violation of LG inequalities.展开更多
In the original time-domain Bell's inequalities(Leggett-Garg-type inequalities),the physical objective is measured at three time points.When more time points are chosen,several methods can be used to extend these ...In the original time-domain Bell's inequalities(Leggett-Garg-type inequalities),the physical objective is measured at three time points.When more time points are chosen,several methods can be used to extend these inequalities.We experimentally demonstrate the violation of these extended inequalities using single photons from a self-assembled quantum dot.In general,for each extension,the quantity by which the quantum-mechanics value exceeds the classical limit becomes larger as the number of measurement time points increases.This quantity has a maximum value for the extensions that have the same number of measurement time points.Furthermore,we evaluate the noise tolerance for these extensions with a quantity that is related to the number of standard deviations by which the experimental result surpasses the classical limit.展开更多
We propose a probabilistic two-party communication complexity scenario with a prior Werner state and analyse the communication abilities of quantum correlations (entanglements) and classical correlations. This process...We propose a probabilistic two-party communication complexity scenario with a prior Werner state and analyse the communication abilities of quantum correlations (entanglements) and classical correlations. This process can be used as an entanglement monotone of Werner states.展开更多
为了提高传感网中数据重构精度以及降低不可靠链路丢包对压缩感知(Compressive Sensing,CS)数据收集的影响,本文提出了一种基于压缩感知丢包匹配数据收集算法(Packet Loss Matching Data Gathering Algorithm Based on Compressive Sens...为了提高传感网中数据重构精度以及降低不可靠链路丢包对压缩感知(Compressive Sensing,CS)数据收集的影响,本文提出了一种基于压缩感知丢包匹配数据收集算法(Packet Loss Matching Data Gathering Algorithm Based on Compressive Sensing,CS-MDGA).本文算法通过压缩感知技术构建了全网数据间的“关联效应”,并设计了基于丢包匹配的稀疏观测矩阵(Sparse Observation Matrix Based on Packet Loss Matching,SPLM),证明了该观测矩阵概率趋近于“1”时,满足的等距约束条件(Restricted Isometry Property,RIP),完成了节点间多路径路由数据的可靠交付.仿真实验结果表明,本文算法在链路丢包率为60%情况下,相对重构误差仍小于5%,验证了本文算法不仅具有较高的重构精度,而且还可以有效缓解不可靠链路丢包对CS数据收集的影响.展开更多
基金Supported by the National Natural Science Foundation of China under Grant No.19874056.
文摘The quantum telebroadcasting of a cat-like state in combination with the quantum teleportation and the local copying of entanglement is presented. This gives a general way of distributing entanglement among distant parties. All of the operations of our scenario are local and within the reach of current technology.
基金Supported by the National Basic Research Program of China,and the National Natural Science Foundation of China under Grant Nos 60921091,11274289.
文摘We investigate the violation of two types of Leggett-Garg(LG)inequalities in self-assembled quantum dots under the stationarity assumption.By comparing the two types of LG inequalities,we find the better one that is easier to be tested in an experiment.In addition,we show that the fine-structure splitting,background noise and temperature of quantum dots greatly affect the violation of LG inequalities.
基金by the National Basic Research Program of Chinathe National Natural Science Foundation of China under Grant Nos 60921091,10874162 and 10734060。
文摘In the original time-domain Bell's inequalities(Leggett-Garg-type inequalities),the physical objective is measured at three time points.When more time points are chosen,several methods can be used to extend these inequalities.We experimentally demonstrate the violation of these extended inequalities using single photons from a self-assembled quantum dot.In general,for each extension,the quantity by which the quantum-mechanics value exceeds the classical limit becomes larger as the number of measurement time points increases.This quantity has a maximum value for the extensions that have the same number of measurement time points.Furthermore,we evaluate the noise tolerance for these extensions with a quantity that is related to the number of standard deviations by which the experimental result surpasses the classical limit.
基金Supported by the National Natural Science Foundation of China under Grant No.69878025。
文摘We propose a probabilistic two-party communication complexity scenario with a prior Werner state and analyse the communication abilities of quantum correlations (entanglements) and classical correlations. This process can be used as an entanglement monotone of Werner states.
文摘为了提高传感网中数据重构精度以及降低不可靠链路丢包对压缩感知(Compressive Sensing,CS)数据收集的影响,本文提出了一种基于压缩感知丢包匹配数据收集算法(Packet Loss Matching Data Gathering Algorithm Based on Compressive Sensing,CS-MDGA).本文算法通过压缩感知技术构建了全网数据间的“关联效应”,并设计了基于丢包匹配的稀疏观测矩阵(Sparse Observation Matrix Based on Packet Loss Matching,SPLM),证明了该观测矩阵概率趋近于“1”时,满足的等距约束条件(Restricted Isometry Property,RIP),完成了节点间多路径路由数据的可靠交付.仿真实验结果表明,本文算法在链路丢包率为60%情况下,相对重构误差仍小于5%,验证了本文算法不仅具有较高的重构精度,而且还可以有效缓解不可靠链路丢包对CS数据收集的影响.
