Supported by the National Natural Science Foundation of China under Grant No 10775097.
Based on the technique of integration within an ordered product of operators we have demonstrated that singlemode mixed states' density matrices can be recast into the normally ordered Gaussian forms [Chin. Phys. Let...
Project supported by the Shanghai Jiaotong University (SJTU) Young Teacher Foundation,China (Grant No A2831B);the SJTU Participating in Research Projects (PRPs),China (Grant No T03011030);the National Natural Science Foundation of China(Grant No 60472018)
For the beam splitter attack strategy against quantum key distribution using two-mode squeezed states, the analytical expression of the optimal beam splitter parameter is provided in this paper by applying the Shannon...