Physics – Quantum Physics
Scientific paper
1995-08-24
Phys.Lett.A200:308,1995
Physics
Quantum Physics
published in Phys. Lett. A 200, 308 (1995)
Scientific paper
10.1016/0375-9601(95)00186-7
It is known that, after formation, a Rydberg wave packet undergoes a series of collapses and revivals within a time period called the revival time, $t_{\rm rev}$, at the end of which it is close to its original shape. We study the behavior of Rydberg wave packets on time scales much greater than $t_{\rm rev}$. We show that after a few revival cycles the wave packet ceases to reform at multiples of the revival time. Instead, a new series of collapses and revivals commences, culminating after a time period $t_{\rm sr} \gg t_{\rm rev}$ with the formation of a wave packet that more closely resembles the initial packet than does the full revival at time $t_{\rm rev}$. Furthermore, at times that are rational fractions of $t_{\rm sr}$, the square of the autocorrelation function exhibits large peaks with periodicities that can be expressed as fractions of the revival time $t_{\rm rev}$. These periodicities indicate a new type of fractional revival occurring for times much greater than $t_{\rm rev}$. A theoretical explanation of these effects is outlined.
Bluhm Robert
Kostelecky Alan
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