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      Observation of heteronuclear Feshbach resonances in a mixture of bosons and fermions.

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          Abstract

          Three magnetic-field induced heteronuclear Feshbach resonances were identified in collisions between bosonic 87Rb and fermionic 40K atoms in their absolute ground states. Strong inelastic loss from an optically trapped mixture was observed at the resonance positions of 492, 512, and 543+/-2 G. The magnetic-field locations of these resonances place a tight constraint on the triplet and singlet cross-species scattering lengths, yielding (-281+/-15)a(0) and (-54+/-12)a(0), respectively. The width of the loss feature at 543 G is 3.7+/-1.5 G wide; this broad Feshbach resonance should enable experimental control of the interspecies interactions.

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          Author and article information

          Journal
          Phys Rev Lett
          Physical review letters
          American Physical Society (APS)
          0031-9007
          0031-9007
          Oct 29 2004
          : 93
          : 18
          Affiliations
          [1 ] JILA, National Institute of Standards and Technology, and University of Colorado, Boulder, CO 80309, USA.
          Article
          10.1103/PhysRevLett.93.183201
          15525160
          55dc4dc0-8916-4262-b08f-cfe6a8f564e5
          History

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