作者: Miguel Orszag , Miguel Orszag
DOI: 10.1007/978-3-319-29037-9_9
关键词: Excited state 、 Planck's law 、 Atom 、 Classical mechanics 、 Physics 、 Langevin equation 、 Coherent states 、 Harmonic oscillator 、 Master equation 、 Markov chain
摘要: Losses play an important role in physics, and general they cannot be avoided. For example, the decay of atom can described as a small or relevant system (the atom) interacting with large reservoir consisting infinite number harmonic oscillators electromagnetic modes. It appears quite surprising that starting from time-reversible dynamics, one ends up irreversible situation, such natural excited atom. Of course, we shall see this is closely related to type approximation (Markov) used.