JILA and Department of Physics, NIST and University of Colorado, Boulder, 80309-0440, USA.
Phys Rev Lett. 2011 Aug 12;107(7):073202. doi: 10.1103/PhysRevLett.107.073202.
Using a narrow intercombination line in alkaline earth atoms to mitigate large inelastic losses, we explore the optical Feshbach resonance effect in an ultracold gas of bosonic (88)Sr. A systematic measurement of three resonances allows precise determinations of the optical Feshbach resonance strength and scaling law, in agreement with coupled-channel theory. Resonant enhancement of the complex scattering length leads to thermalization mediated by elastic and inelastic collisions in an otherwise ideal gas. Optical Feshbach resonance could be used to control atomic interactions with high spatial and temporal resolution.
利用堿土金属原子中的窄组合线来减轻大的非弹性损耗，我们在玻色（88）Sr 的超冷气体中探索光学 Feshbach 共振效应。通过对三个共振的系统测量，可以精确确定光学 Feshbach 共振强度和标度律，与耦合通道理论一致。共振增强了复杂散射长度，导致在理想气体中通过弹性和非弹性碰撞进行热化。光学 Feshbach 共振可用于以高空间和时间分辨率控制原子相互作用。
