Confinement-induced Efimov resonances in Fermi-Fermi mixtures
Author(s)Nishida, Yusuke; Tan, Shina
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A Fermi-Fermi mixture of 40K and 6Li does not exhibit the Efimov effect in a free space, but the Efimov effect can be induced by confining only 40K in one dimension. Here the Efimov’s three-body parameter is controlled by the confinement length. We show that the three-body recombination rate in such a system in the dilute limit has a characteristic logarithmic-periodic dependence on the effective scattering length with the scaling factor 22.0 and can be expressed by formulas similar to those for identical bosons in three dimensions. The ultracold mixture of 40K and 6Li in the one-dimensional–three-dimensional mixed dimensions is thus a promising candidate to observe the Efimov physics in fermions.
DepartmentMassachusetts Institute of Technology. Center for Theoretical Physics; Massachusetts Institute of Technology. Department of Physics
Physical Review A
American Physical Society
Nishida, Yusuke , and Shina Tan. “Confinement-induced Efimov resonances in Fermi-Fermi mixtures.” Physical Review A 79.6 (2009): 060701. (C) 2010 The American Physical Society.
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