Observation of Cavity-Mediated Long-Range Light Forces between Strongly Coupled Atoms

P. Münstermann, T. Fischer, P. Maunz, P. W.H. Pinkse, G. Rempe

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Abstract

We report on the observation of long-range forces between ultracold rubidium atoms that are mutually coupled by the field of a driven high-finesse optical cavity. Even for much less than one photon in the cavity on average, the forces strongly influence the spatial distribution of the atoms. This manifests itself as an asymmetric normal-mode spectrum of the strongly coupled atoms-cavity system. Expressions are given for the dipole force and the diffusion coefficient for the atoms in the presence of the other atoms. The data agree well with calculated spectra, which include the full motional dynamics of the many- atom system.

Original languageEnglish
Pages (from-to)4068-4071
Number of pages4
JournalPhysical review letters
Volume84
Issue number18
DOIs
Publication statusPublished - 1 May 2000
Externally publishedYes

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