Measurement of the zero crossing in a Feshbach resonance of fermionic [Formula Presented]

Journal Article (Journal Article)

We measure a zero crossing in the scattering length of a mixture of the two lowest hyperfine states of [Formula Presented] To locate the zero crossing, we monitor the decrease in temperature and atom number arising from evaporation in a [Formula Presented] laser trap as a function of magnetic field B. The temperature decrease and atom loss are minimized for [Formula Presented] consistent with no evaporation. We also present preliminary calculations using potentials that have been constrained by the measured zero crossing and locate a broad Feshbach resonance at [Formula Presented] in agreement with previous theoretical predictions. In addition, our theoretical model predicts a second and much narrower Feshbach resonance near 55 mT. 5555 2002 The American Physical Society.

Full Text

Duke Authors

Cited Authors

  • O’Hara, KM; Hemmer, SL; Granade, SR; Gehm, ME; Thomas, JE; Venturi, V; Tiesinga, E; Williams, CJ

Published Date

  • January 1, 2002

Published In

Volume / Issue

  • 66 / 4

Start / End Page

  • 4 -

Electronic International Standard Serial Number (EISSN)

  • 1094-1622

International Standard Serial Number (ISSN)

  • 1050-2947

Digital Object Identifier (DOI)

  • 10.1103/PhysRevA.66.041401

Citation Source

  • Scopus