%0 Journal Article
%T A hybrid model for Rydberg gases including exact two-body correlations
%A K. P. Heeg
%A M. G£¿rttner
%A J. Evers
%J Physics
%D 2012
%I arXiv
%R 10.1103/PhysRevA.86.063421
%X A model for the simulation of ensembles of laser-driven Rydberg-Rydberg interacting multi-level atoms is discussed. Our hybrid approach combines an exact two-body treatment of nearby atom pairs with an effective approximate treatment for spatially separated pairs. We propose an optimized evolution equation based only on the system steady state, and a time-independent Monte Carlo technique is used to efficiently determine this steady state. The hybrid model predicts features in the pair correlation function arising from multi-atom processes which existing models can only partially reproduce. Our interpretation of these features shows that higher-order correlations are relevant already at low densities. Finally, we analyze the performance of our model in the high-density case.
%U http://arxiv.org/abs/1202.2779v2