论文标题
在狭窄的Feshbach共振上相互作用的玻色气
Interacting Bose gas across a narrow Feshbach resonance
论文作者
论文摘要
我们使用两通道模型来研究野外路径积分方法中狭窄的Feshbach共振的相互作用的bose气体。基态性能与宽阔的Feshbach共振或单个通道相互作用显示出很强的偏差。偏差可以通过在狭窄的Feshbach共振附近的两体散射长度的强能依赖性来解释。随着密度的增加，发现每个颗粒的化学势和能量会饱和，而反向压缩性和声子速度则会显着降低。我们还考虑了高斯波动，并计算基态能量校正以及量子耗竭。
We use a two-channel model to investigate an interacting Bose gas across a narrow Feshbach resonance within a field path integral approach. The ground state properties show strong deviation from that of a broad Feshbach resonance or a single channel interaction. The deviation can be interpreted by the strong energy dependence of two-body scattering length near a narrow Feshbach resonance. As the density increases, the chemical potential and energy per particle are found to saturate while the inverse compressibility and phonon velocity undergo a significant reduction. We also take Gaussian fluctuations into account and calculate the ground state energy correction as well as the quantum depletion.
