Experimental Creation of Entanglement Using Separable States

We experimentally demonstrate that the entanglement can be created on two distant particles using separable states. We show that two working particles can share some entanglement, while one ancilla particle always remains separable from the two working particles during the experimental evolution of the system. Our experiment can be viewed as a benchmark to illustrate the idea that no prior entanglement is necessary to create entanglement.     

混合型TEA CO_2激光器的实验研究

本文描述了混合型TEA CO_2激光器的三种结构,给出了五个方面的实验结果.它们是:腔长的影响;连续CO_2激光功率的影响;输出能量和激光脉冲波形;选支输出和脉冲低气压CO_2激光管。对所得结果做了简明的讨论。     

利用核磁共振产生无耦合自旋之间的纠缠

纠缠是量子信息中重要的资源,因此产生纠缠是实现量子信息处理的一项基本任务.通常,用整体操作和纠缠交换等方法可以产生纠缠.在大多数的物理体系中,量子位之间没有相互作用,但需要产生它们之间的纠缠.在这种情况下,如何产生纠缠?并且,产生纠缠需要预先的纠缠吗?