论文标题
改进了光场的纠缠指标及其在事件就绪的实验中的应用，用于诱发的非高斯性真空吸尘器
Improved entanglement indicators for optical fields and its application in the event-ready experiment for bright squeezed vacuum with induced non-gaussianity
论文作者
论文摘要
四个模式光场的可分离性条件的更好版本，即给出了两种具有两种相互正交极化模式的光束。我们的条件涉及差异。它们的含义是直观的，实施是可行的。也就是说，如果对于给定的量子状态，则数据围绕其平均值的扩散小于针对可分离状态的最小差异，则给定的状态是纠缠的。我们的条件是针对可观察到的标准量子Stokes和标准化的可观察到的，结果要比涉及方差的四个模式光场的先前条件更有效。我们测试了通过（没有）诱导的非高斯性通过光子的添加或减法获得的（且没有）诱导的非高斯性的条件。我们还提出了一个实验方案，即如何为事件就绪的实验生成此类状态。
Better versions of separability conditions for four mode optical fields, i.e. two beams with two modes of mutually orthogonal polarization are given. Our conditions involve variances. Their meaning is intuitive and their implementation is feasible. Namely, if for a given quantum state the spread of the data around its mean value is smaller than the minimal spread predicted for the set of separable states, then the given state is entangled. Our conditions are formulated for standard quantum Stokes observables and normalized Stokes observables and result to be more efficient that the previous conditions for four mode optical fields involving variances. We test our conditions for bright squeezed vacuum with (and without) induced non-gaussianity obtained by addition or subtraction of photons. Also we propose a practical experimental scheme of how to generate such states for an event-ready experiment.
