Romera Elvira, de Los Santos Francisco
Instituto Carlos I de Física Teórica y Computacional, Universidad de Granada, Fuentenueva s/n, 18071 Granada, Spain.
Phys Rev Lett. 2007 Dec 31;99(26):263601. doi: 10.1103/PhysRevLett.99.263601. Epub 2007 Dec 28.
Wave-packet fractional revivals is a relevant feature in the long time-scale evolution of a wide range of physical systems, including atoms, molecules, and nonlinear systems. We show that the sum of information entropies in both position and momentum conjugate spaces is an indicator of fractional revivals by analyzing three different model systems: (i) the infinite square well, (ii) a particle bouncing vertically against a wall in a gravitational field, and (iii) the vibrational dynamics of hydrogen iodide molecules. This description in terms of information entropies complements the usual one in terms of the autocorrelation function.
波包分数复苏是包括原子、分子和非线性系统在内的广泛物理系统在长时间尺度演化中的一个相关特征。通过分析三个不同的模型系统，我们表明位置和动量共轭空间中的信息熵之和是分数复苏的一个指标：（i）无限深方势阱，（ii）在引力场中垂直反弹墙壁的粒子，以及（iii）碘化氢分子的振动动力学。这种用信息熵的描述补充了通常用自相关函数的描述。
