Quantum chaos of a mixed, open system of kicked cold atoms

Details Quantum chaos of a mixed, open system of kicked cold atoms Quantum chaos of a mixed, open system of kicked cold atoms

2010-09-16

arxiv.org/abs/1009.3288v2

Physics

Quantum Physics

19 pages, 21 figures, (accepted for publication in Phys. Rev. E)

Scientific paper

The quantum and classical dynamics of particles kicked by a gaussian attractive potential are studied. Classically, it is an open mixed system (the motion in some parts of the phase space is chaotic, and in some parts it is regular). The fidelity (Lochshmidt echo) is found to exhibit oscillations that can be determined from classical considerations but are sensitive to phase space structures that are smaller than Planck's constant. Families of quasi-energies are determined from classical phase space structures. Substantial differences between the classical and quantum dynamics are found for time dependent scattering. It is argued that the system can be experimentally realized by cold atoms kicked by a gaussian light beam.

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