论文标题
统一的玻色气的演变，以宽至狭窄的Feshbach共振
Evolution of the unitary Bose gas for broad to narrow Feshbach resonances
论文作者
论文摘要
我们使用两通道模型研究了统一叶气体的淬火后动力学，重点是由于密度变化而导致的Feshbach共振宽度变化的影响。我们通常发现，增加密度会导致封闭通道分子的产生相应增加，量子耗竭的堆积减少以及从线性到二次接触的二次早期生长以及凝结成对分数的过渡。由于在单一制度中存在封闭通道分子的动机，我们研究了嵌入的两体问题，发现由于多体效应，从开放到封闭通道的二聚体过渡。
We study the post-quench dynamics of unitary Bose gases using a two-channel model, focusing on the effect of variations in the width of the Feshbach resonance due to density changes. We generally find that increasing the density leads to a corresponding increase in the production of closed channel molecules, a decrease in the build up of quantum depletion and a transition from linear to quadratic early-time growth of the two-body contact as well as the condensed pair fraction. Motivated by the presence of closed-channel molecules in the unitary regime, we study the embedded two-body problem finding a transition from open to closed-channel dominated dimers due to many-body effects.
