منابع مشابه
Non-dispersive wave packets in periodically driven quantum systems
With the exception of the harmonic oscillator, quantum wave-packets usually spread as time evolves. This is due to the non-linear character of the classical equations of motion which makes the various components of the wave-packet evolve at various frequencies. We show here that, using the nonlinear resonance between an internal frequency of a system and an external periodic driving, it is poss...
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Extended Abstract. The simplest and the most common way of comparing two random variables is through their means and variances. It may happen that in some cases the median of X is larger than that of Y, while the mean of X is smaller than the mean of Y. However, this confusion will not arise if the random variables are stochastically ordered. Similarly, the same may happen if one would like to ...
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ژورنال
عنوان ژورنال: Brazilian Journal of Physics
سال: 2011
ISSN: 0103-9733,1678-4448
DOI: 10.1007/s13538-011-0053-y