论文标题
使用干涉条纹测量经典纠缠
Measurement of classical entanglement using interference fringes
论文作者
论文摘要
经典的纠缠是指偏振方向与光场极化幅度之间的不可分割的相关性。纠缠程度由施密特数量量化，占据可分离状态的统一值，最大纠缠状态的统一值。我们提出了两种检测方法，以根据可检测到的未知激光束得出的四个光源之间的可区分干扰模式来确定此数字。第二种方法是对第一个方法的修改具有与纠缠状态唯一相关的可辨别角度的干扰条纹。最大纠缠状态对应于45°或135°方向上的对角轴的边缘对称，而可分离状态则对应于X-或Y轴或同时对应的条纹对称。在统一和两个之间具有施密特数字的状态在这两个极端之间具有对称角度的边缘。检测方法将有助于构建经典纠缠状态中包含的信息传输通道。
Classical entanglement refers to non-separable correlations between the polarization direction and the polarization amplitude of a light field. The degree of entanglement is quantified by the Schmidt number, taking the value of unity for a separable state and two for a maximally entangled state. We propose two detection methods to determine this number based on the distinguishable patterns of interference between four light sources derived from the unknown laser beam to be detected. The second method being a modification of the first one has the interference fringes form discernable angles uniquely related to the entangled state. The maximally entangled state corresponds to fringes symmetric about the diagonal axis at either 45° or 135° direction while the separable state corresponds to fringes symmetric either about the X- or Y-axis or both simultaneously. States with Schmidt number between unity and two have fringes of symmetric angles between these two extremes. The detection methods would be beneficial to constructing transmission channels of information contained in the classically entangled states.
