Publicação:
Effective range from tetramer-dissociation data for cesium atoms

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2-s2.0-84872703708.pdf (399.13 KB)

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2013-01-17

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Resumo

The shifts in the four-body recombination peaks, due to an effective range correction to the zero-range model close to the unitary limit, are obtained and used to extract the corresponding effective range of a given atomic system. The approach is applied to an ultracold gas of cesium atoms close to broad Feshbach resonances, where deviations of experimental values from universal model predictions are associated with effective range corrections. The effective range correction is extracted with a weighted average given by 3.9±0.8R vdW, where RvdW is the van der Waals length scale, which is consistent with the van der Waals potential tail for the Cs2 system. The method can be generally applied to other cold atom experimental setups to determine the contribution of the effective range to the tetramer dissociation position. © 2013 American Physical Society.

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Atomic system, Cesium atom, Cold atoms, Effective range, Experimental values, Feshbach resonances, Length scale, Tetramers, Ultracold gas, Unitary limits, Universal model, Van der waals, Weighted averages, Cesium, Dissociation, Oligomers, Van der Waals forces, Atoms

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Inglês

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Physical Review A - Atomic, Molecular, and Optical Physics, v. 87, n. 1, 2013.

URI

http://hdl.handle.net/11449/74392

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São Paulo - IFT - Instituto de Física Teórica

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