In every state of a quantum particle, Wigner's quasidistribution is the unique quasidistribution on the phase space with the correct marginal distributions for position, momentum, and all their linear combinations.

翻译：在量子粒子的每一个状态中,威纳的准分布是阶段空间上独特的准分布,其位置、动力和所有线性组合的正确边际分布是正确的。