title: Imaging spatial correlations of Rydberg excitations in cold atom clouds.
abstract: We use direct spatial imaging of cold 85Rb Rydberg atom clouds to measure the Rydberg-Rydberg correlation function. The results are in qualitative agreement with theoretical predictions [F. Robicheaux and J. V. Hernández, Phys. Rev. A 72, 063403 (2005)]. We determine the blockade radius for states 44D(5/2), 60D(5/2), and 70D(5/2) and investigate the dependence of the correlation behavior on excitation conditions and detection delay. Experimental data hint at the existence of long-range order.
authors: FOCUS Center, Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA.
authors: A
authors: A
authors: Schwarzkopf
authors: R E
authors: RE
authors: Sapiro
authors: G
authors: G
authors: Raithel