Modeling many-particle mechanical effects of an interacting Rydberg gas

Details Modeling many-particle mechanical effects of an interacting Rydberg gas Modeling many-particle mechanical effects of an interacting Rydberg gas

2007-05-23

arxiv.org/abs/0705.3302v2

Physics

Atomic Physics

Scientific paper

10.1103/PhysRevA.76.054702

In a recent work [Phys. Rev. Lett. 98, 023004 (2007)] we have investigated the influence of attractive van der Waals interaction on the pair distribution and Penning ionization dynamics of ultracold Rydberg gases. Here we extend this description to atoms initially prepared in Rydberg states exhibiting repulsive interaction. We present calculations based on a Monte Carlo algorithm to simulate the dynamics of many atoms under the influence of both repulsive and attractive longrange interatomic forces. Redistribution to nearby states induced by black body radiation is taken into account, changing the effective interaction potentials. The model agrees with experimental observations, where the ionization rate is found to increase when the excitation laser is blue-detuned from the atomic resonance.

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