Abstract

Dynamical localization is one of the signature of quantum chaos most intensely studied in recent years These studies rely on the experimental realization of a kicked rotor by placing cold atoms in a far detuned, periodically driven, stationary wave For a set of parameters such that the classical limit of such a system shows a chaotic, diffusive motion in the momentum space, quantum interferences have been shown to suppress the chaotic diffusion in the quantum case The momentum distribution then presents a characteristic double exponential form This phenomenon has been first evidenced experimentally with cold atoms by the group of M Raizen, in 1994 [1], and they lately also shown that it can be destroyed by dissipation (i e, in the present context, spontaneous emission), or by important amounts of added noise [2]

© 2000 IEEE