Lifetime of the Bose gas with resonant interactions

B. S. Rem, A. T. Grier, I. Ferrier-Barbut, U. Eismann, T. Langen, N. Navon, L. Khaykovich, F. Werner, D. S. Petrov, F. Chevy, C. Salomon

Research output: Contribution to journalArticlepeer-review


We study the lifetime of a Bose gas at and around unitarity using a Feshbach resonance in lithium 7. At unitarity, we measure the temperature dependence of the three-body decay coefficient L3. Our data follow a L33/T2 law with λ3=2.5(3) stat(6)syst×10-20 (μK)2 cm6 s -1 and are in good agreement with our analytical result based on zero-range theory. Varying the scattering length a at fixed temperature, we investigate the crossover between the finite-temperature unitary region and the previously studied regime where |a| is smaller than the thermal wavelength. We find that L3 is continuous across the resonance, and over the whole a<0 range our data quantitatively agree with our calculation.

Original languageEnglish
Article number163202
JournalPhysical Review Letters
Issue number16
StatePublished - 19 Apr 2013

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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