(2002)] has been generalized for a dilute (in the sense that the range of interatomic potential, R, is small compared with inter-particle spacing r0) uniform gas of bosons near the Feshbach resonance using the multi-channel zero-range potential model. The method has been applied to Na(F = 1, mF = 1) atoms near the B0 = 907G Feshbach resonance. It is shown that at high densities na3 ≫ 1, there are significant differences between our results for the real part of energy per particle and the one-channel zero-range potential approximation. We point out the possibility of stabilization of the uniform condensate for the case of negative scattering length.(2002)] has been generalized for a dilute (in the sense that the range of interatomic potential, R, is small compared with inter-particle spacing r0) uniform gas of bosons near the Feshbach resonance using the multi-channel zero-range potential model. The method has been applied to Na(F = 1, mF = 1) atoms near the B0 = 907G Feshbach resonance. It is shown that at high densities na3 ≫ 1, there are significant differences between our results for the real part of energy per particle and the one-channel zero-range potential approximation. We point out the possibility of stabilization of the uniform condensate for the case of negative scattering length.

Jan 1, 20026 citations

Cold Bose Gases near Feshbach Resonances

Yeong E. Kim, Alexander L. Zubarev

The lowest order constrained variational method [Phys. Rev. Lett. 88, 210403 (2002)] has been generalized for a dilute (in the sense that the range of interatomic potential is small compared with inter-particle spacing) uniform gas of bosons near the Feshbach resonance using the multi-channel zero-range potential model. The method has been applied to Na (F=1, m_F=1) atoms near the $B_0=907$ G Feshbach resonance. It is shown that at high densities, there are significant differences between our results for the real part of energy per particle and the one-channel zero-range potential approximation. We point out the possibility of stabilization of the uniform con densate for the case of negative scattering length.The lowest order constrained variational method [Phys. Rev. Lett. 88, 210403 (2002)] has been generalized for a dilute (in the sense that the range of interatomic potential is small compared with inter-particle spacing) uniform gas of bosons near the Feshbach resonance using the multi-channel zero-range potential model. The method has been applied to Na (F=1, m_F=1) atoms near the $B_0=907$G Feshbach resonance. It is shown that at high densities, there are significant differences between our results for the real part of energy per particle and the one-channel zero-range potential approximation. We point out the possibility of stabilization of the uniform con densate for the case of negative scattering length.

arXiv:cond-mat/0305692May 29, 20030 citations

Feshbach Resonances in Ultracold Gases

Eite Tiesinga, Cheng Chin, Rudolf Grimm +1 more

APSMay 1, 200911 citations

B_0=907

G Feshbach resonance. It is shown that at high densities, there are significant differences between our results for the real part of energy per particle and the one-channel zero-range potential approximation. We point out the possibility of stabilization of the uniform con densate for the case of negative scattering length.