Journal
PHYSICAL REVIEW LETTERS
Volume 110, Issue 13, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.110.135301
Keywords
-
Categories
Funding
- IMPRS-QD, Helmholtz Alliance [HA216/EMMI]
- Heidelberg Center for Quantum Dynamics, ERC [279697]
- EPSRC, AFSOR MURI [FA9550-09-1-0617]
- EOARD [FA8655-10-1-3033]
- EPSRC [EP/I012044/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/I012044/1] Funding Source: researchfish
- European Research Council (ERC) [279697] Funding Source: European Research Council (ERC)
Ask authors/readers for more resources
We perform radio-frequency dissociation spectroscopy of weakly bound Li-6(2) 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 Li-6 scattering potential using coupled-channel calculations. From this new potential, we determine the pole positions of the broad Li-6 Feshbach resonances with an accuracy better than 7 x 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 xi measured by Ku et al. [Science 335, 563 (2012)], which is xi = 0.370(5)(8). DOI: 10.1103/PhysRevLett.110.135301
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available