| Autor: |
G, Zürn, T, Lompe, A N, Wenz, S, Jochim, P S, Julienne, J M, Hutson |
| Rok vydání: |
2012 |
| Zdroj: |
Physical review letters. 110(13) |
| ISSN: |
1079-7114 |
| Popis: |
We perform radio-frequency dissociation spectroscopy of weakly bound 6Li2 Feshbach molecules using low-density samples of about 30 molecules in an optical dipole trap. Combined with a high magnetic field stability, this allows us to resolve the discrete trap levels in the radio-frequency dissociation spectra. This novel technique allows the binding energy of Feshbach molecules to be determined with unprecedented precision. We use these measurements as an input for a fit to the 6Li scattering potential using coupled-channel calculations. From this new potential, we determine the pole positions of the broad 6Li Feshbach resonances with an accuracy better than 7×10(-4) of the resonance widths. This eliminates the dominant uncertainty for current precision measurements of the equation of state of strongly interacting Fermi gases. As an important consequence, our results imply a corrected value for the Bertsch parameter ξ measured by Ku et al. [Science 335, 563 (2012)], which is ξ=0.370(5)(8). |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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