Cooperative excitation and many-body interactions in a cold rydberg gas

Anno: 2012

Autori: Viteau M., Huillery P., Bason M.G., Malossi N., Ciampini D., Morsch O., Arimondo E., Comparat D., Pillet P.

Affiliazione autori: INO-CNR, Largo Pontecorvo 3, 56127 Pisa, Italy Laboratoire Aimé Cotton, Université Paris-Sud, Bĝtiment 505, 91405 Orsay, France Dipartimento di Fisica E. Fermi, Università di Pisa, Largo Pontecorvo 3, 56127 Pisa, Italy; CNISM UdR, Dipartimento di Fisica E. Fermi, Università di Pisa, Largo Pontecorvo 3, 56127 Pisa, Italy

Abstract: The dipole blockade of Rydberg excitations is a hallmark of the strong interactions between atoms in these high-lying quantum states [M. Saffman, T. G. Walker, and K. Molmer, Rev. Mod. Phys. 82, 2313 (2010); D. Comparat and P. Pillet, J. Opt. Soc. Am. B 27, A208 (2010)]. One of the consequences of the dipole blockade is the suppression of fluctuations in the counting statistics of Rydberg excitations, of which some evidence has been found in previous experiments. Here we present experimental results on the dynamics and the counting statistics of Rydberg excitations of ultracold rubidium atoms both on and off resonance, which exhibit sub-and super-Poissonian counting statistics, respectively. We compare our results with numerical simulations using a novel theoretical model based on Dicke states of Rydberg atoms including dipole-dipole interactions, finding good agreement between experiment and theory.


Volume: 109 (5)      Da Pagina: 053002  A: 053002

Maggiori informazioni: This work was supported by the EU through Grants No. 225187-NAMEQUAM and No. 265031-ITN-COHERENCE and the collaboration between University of Pisa and University of Paris-Sud 11. The authors thank M. Allegrini, R. Cote, P. Grangier, T. Pohl, M. Saffman, J. Stanojevic, and M. Weidemuller for useful discussions and J. Radogostowicz for assistance.
DOI: 10.1103/PhysRevLett.109.053002

Citazioni: 58
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