de Gosson Maurice A
Faculty of Mathematics (NuHAG), University of Vienna, Vienna, Austria.
Lett Math Phys. 2021;111(3):73. doi: 10.1007/s11005-021-01410-4. Epub 2021 May 24.
We show that every Gaussian mixed quantum state can be disentangled by conjugation with a passive symplectic transformation, that is a metaplectic operator associated with a symplectic rotation. The main tools we use are the Werner-Wolf condition on covariance matrices and the symplectic covariance of Weyl quantization. Our result therefore complements a recent study by Lami, Serafini, and Adesso.
我们证明,通过与一个被动辛变换共轭,即与一个辛旋转相关联的元辛算子,每个高斯混合量子态都可以被解缠。我们使用的主要工具是协方差矩阵上的维尔纳 - 沃尔夫条件和外尔量子化的辛协方差。因此,我们的结果补充了拉米、塞拉菲尼和阿德索最近的一项研究。