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

doi:10.1103/PhysRevLett.110.163202

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

Department of Physics

Research output: Contribution to journal › Article › peer-review

114 Scopus citations

Abstract

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 L₃=λ₃/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 language	English
Article number	163202
Journal	Physical Review Letters
Volume	110
Issue number	16
DOIs	https://doi.org/10.1103/PhysRevLett.110.163202
State	Published - 19 Apr 2013

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title = "Lifetime of the Bose gas with resonant interactions",

abstract = "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 L3=λ3/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.",

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T1 - Lifetime of the Bose gas with resonant interactions

AU - Rem, B. S.

AU - Grier, A. T.

AU - Ferrier-Barbut, I.

AU - Eismann, U.

AU - Langen, T.

AU - Navon, N.

AU - Khaykovich, L.

AU - Werner, F.

AU - Petrov, D. S.

AU - Chevy, F.

AU - Salomon, C.

PY - 2013/4/19

Y1 - 2013/4/19

N2 - 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 L3=λ3/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.

AB - 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 L3=λ3/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.

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Lifetime of the Bose gas with resonant interactions

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