Physics – Quantum Physics
Scientific paper
1997-02-21
Acta Phys.Polon.B28:243-255,1997
Physics
Quantum Physics
10 pages, LaTeX, 7 PS figures (in 6 separate files), to appear in Acta Phys. Polon. (Invited lecture at XXXI Zakopane School o
Scientific paper
The article discusses the properties of time evolution of wave packets in a few systems. Dynamics of wave packet motion for Rydberg atoms with the hierarchy of collapses and revivals is briefly reviewed. The main part of the paper focuses on the new mechanism of quantum reccurrences in wave packet dynamics. This mechanism can occur (in principle) in any physical system with strong enough spin-orbit interaction. We discuss here the SPIN_ORBIT PENDULUM effect that consists in different motions of subpackets possessing different spin fields and results in oscillations of a fraction of average angular momentum between spin and ordinary subspaces. The evolution of localized wave packet into toroidal objects and backwards (for other class of initial conditions) is also subject to discussion.
Arvieu R.
Berej Waldemar
Rozmej Piotr
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