摘要
We show a scheme to distribute the entanglement by using three-mode separable Gaussian state prepared with imperfect equipments. The scheme achieves the aim that the entanglement is distributed between two distant parties with only Gaussian operations and linear optics elements. Moreover, we analyse the logarithmic negativity of the entanglement shared between the two parties when the systems are imperfect and arrive at the conclusion that the logarithmic negativity is asymptotically stable with fluctuations within a certain space range.
We show a scheme to distribute the entanglement by using three-mode separable Gaussian state prepared with imperfect equipments. The scheme achieves the aim that the entanglement is distributed between two distant parties with only Gaussian operations and linear optics elements. Moreover, we analyse the logarithmic negativity of the entanglement shared between the two parties when the systems are imperfect and arrive at the conclusion that the logarithmic negativity is asymptotically stable with fluctuations within a certain space range.
基金
Project supported by the National Natural Science Foundation of China (Grant Nos.60873191,60903152,and 60821001)
the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant Nos.200800131016 and 20090005110010)
the Beijing Nova Program,China (Grant No.2008B51)
the Key Program of Ministry of Education of China (Grant No.109014)
