【摘要】 根据LudwigKnoll等人对两个量子态之间的距离函数的定义,得到了两个任意相干态,真空态与相干态之间的距离函数的一般表达式D(ρ1,ρ2).依据D(ρ1,ρ2)详细讨论了它们之间的相似特性及与其内禀参数之间的关系,结果发现态|β1〉和|β2〉的相似程度不但与每个相干态在复空间平移的距离有关,而且与两个相干态相的初始相位差Δθ相关.在一定条件下随着Δθ的变化呈现周期性变化;只有在平移距离很小时相干态与真空态相似.更多还原

【Abstract】 Based on the Ludwig Knll s general definition of distance function of which is between two quantum states, the general distance function between the two coherent state |β1>,|β2> , vacuum state and coherent state are studied. The relationships amount this distance and the parameters of states are discussed carefully. It is find that the similitude degrees of states |β1> and |β2> correlate with distance of every distance which is moved in complex space, and D(β1,β2) represents cyclically mutation with their initially phases differential Δ θ changing under some condition.If distance is displaced very small, coherent state is same as vacuum state.更多还原