1993 年 62 巻 9 号 p. 3044-3051
We propose a stochastic model of phonon-number fluctuations that allows to simulate 1⁄f-like behavior. The fluctuation process is described as a random walk on the ladder of energy levels of a harmonic oscillator. Two characteristic time scales are involved in the process: the mean life time of states τl and the correlation time τc. When the ratio τc⁄τl is large, the 1⁄f-like spectrum is observed within the frequency range 1⁄τc<f<1⁄τl. Conditions for large values of the ratio are discussed.
この記事は最新の被引用情報を取得できません。