| 1. | Pure state and mixed state in quantum information
量子信息中的纯态和混合态 |
| 2. | Geometric algebra analysis of quantum pure state and mixed state
量子纯态与混合态的几何代数分析 |
| 3. | We discuss the distillation of entanglement from finite copies of a mixed state
) n系统中量子态结构纠缠的下限。 |
| 4. | Entanglement of formation for high dimensional quantum states is investigated . an analytical expression of the entanglement of formation for a special quantum mixed states is obtained
摘要研究了高维量子混合态的生成纠缠，给出了一类特殊量子混合态的生成纠缠的解析表示。 |
| 5. | With the aid of ancilla , the sufficient condition and local operation strategy for state transformation from entangled pure states to entangled mixed states under locc are present
利用辅助系统得到了在局域操作和经典通信下，一定的纠缠纯态转换到特定的纠缠混合态的充分条件及具体的转换方案。 |
| 6. | A mixed state secondary school has banned skirts because its girls have been wearing them too short . the new uniform regulations at keswick high school , near ipswich , require girls to wear trousers to school to stop them
位于易普威治古城附近的凯塞克中学最新出台的学生制服条例规定：女生必须穿裤子而不能穿超短裙来上课。 |
| 7. | It is shown that the distillation of entanglement ( from finite copies or infinite copies of a mixed state ) is to project out a subspace , the projection of all copies of the mixed state in this subspace is a pure entangled state
) 2系统的混合态的提取纠缠。并把这些结论推广到了二体混合态在无限个拷贝情况下的纠缠提取。 |
| 8. | The main contents of this thesis are shown below : 1 . a necessary and sufficient condition of the separability of a mixed state in bipartite systems is presented by decomposing a higher dimension hilbert space into many 2 2 subspaces
主要内容包括： 1 、提出了一种通过把高维hilbert空间投影到多个低维子空间的方法，来研究纠缠态的判据，得到了纠缠态的一个充分必要判据。 |
| 9. | We give three kinds of bounds for the entanglement of quantum gaussian mixed state . to verify that if they are too loose bounds we use a two parameters quantum gaussian state called squeezed thermal state and calculated all this bounds and moreover the coherent information of the state for comparison
给出量子高斯混合态的三种界限，用只有两个参数的叫做压缩热态的量子高斯态来检验它们是否是较好的上下限，同时计算了态的相干信息以作比较。 |
| 10. | At a definite temperature a mesoscopic circuit isnt in a determinate quantum state instead of in the mixed state ( or statistical state ) . using the density matrix of the canonical ensemble , we have deduced the formulate of the quantum fluctuations of both charge and current in a non - dissipative mesoscopic coupled circuit . and the dependences of the quantum fluctuation of the circuit on its temperature have obtained
在有限温度下，介观电路系统实际上并不处在一个确定的量子状态，而是处在混合态.根据正则系综的密度矩阵导出耦合互感电路中电荷和电流的量子涨落，得到了量子涨落与温度的依赖关系 |
