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
We investigate the dynamics of entanglement,quantum correlation and classical correlation for the one-dimensional XY model in a transverse magnetic field.With the initial state polarized along the z axis,we find that ...We investigate the dynamics of entanglement,quantum correlation and classical correlation for the one-dimensional XY model in a transverse magnetic field.With the initial state polarized along the z axis,we find that the first maximum of the classical correlation between the nearest neighbor sites peaks around the critical point for large anisotropy parameter.It may indicate the quantum phase transition.For all kinds of correlation,we find that their behaviors between the nearest neighbor sites are significantly different from those of the next-nearestneighbor sites.展开更多
We present a detailed study on the dynamics of two-qubit correlations in non-Markovian environments,applying the hierarchy equations approach.This treatment is free from the limitation of perturbative,Markovian or rot...We present a detailed study on the dynamics of two-qubit correlations in non-Markovian environments,applying the hierarchy equations approach.This treatment is free from the limitation of perturbative,Markovian or rotating wave approximations.It is shown that crossovers and sudden changes in the classical and quantum correlations can appear when the strength of the interaction between qubits is gradually reduced.For some special initial states,there are even sudden transitions between the classical and quantum correlations.展开更多
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Supported by the National Basic Research Program of China,the Knowledge Innovation Program of Chinese Academy of Sciences,the National Natural Science Foundation of China under Grant Nos 60121503 and 10874162the International Partnership Project of Chinese Academy of Sciences。
文摘We investigate the dynamics of entanglement,quantum correlation and classical correlation for the one-dimensional XY model in a transverse magnetic field.With the initial state polarized along the z axis,we find that the first maximum of the classical correlation between the nearest neighbor sites peaks around the critical point for large anisotropy parameter.It may indicate the quantum phase transition.For all kinds of correlation,we find that their behaviors between the nearest neighbor sites are significantly different from those of the next-nearestneighbor sites.
基金Supported by the National Basic Research Program,and the National Natural Science Foundation of China under Grant Nos 60921091 and 10874162.
文摘We present a detailed study on the dynamics of two-qubit correlations in non-Markovian environments,applying the hierarchy equations approach.This treatment is free from the limitation of perturbative,Markovian or rotating wave approximations.It is shown that crossovers and sudden changes in the classical and quantum correlations can appear when the strength of the interaction between qubits is gradually reduced.For some special initial states,there are even sudden transitions between the classical and quantum correlations.
