Through a typical quantum measurement model, we study the relation between decoherence of a central two-level system and quantum phase transition in its environment. 通過(guò)一個(gè)典型的量子測量模型，我們研究了一個(gè)二能級系統的退相干與和他耦合的環(huán)境的量子相變之間的關(guān)系。
Through diffraction invese ratio relation and quantization of geometrical optics,the transition between geometrical optics and wave optics was discussed. 通過(guò)衍射反比關(guān)系和幾何光學(xué)的量子化，討論了幾何光學(xué)和波動(dòng)光學(xué)的過(guò)渡問(wèn)題。
