一维少玻色子混合体中的材料势垒隧穿
Material-barrier Tunneling in One-dimensional Few-boson Mixtures
摘要：
本文研究了强相互作用少玻色子混合体在一维陷阱中的量子动力学。如果一个物种与另一个物种相比是强烈本地化的（例如，重得多），它可以作为该移动组件的有效势垒。在无限局域化的极限附近，我们将其映射到双阱中的全同玻色子系统。对于现实的本地化，解释的“障碍”原子上的光物种的反作用-最低阶-在这些之间的诱导吸引力。即使在平衡状态下，这也可能超过纯粹的物种间相互作用，导致意想不到的相关状态。值得注意的是，反作用极大地影响了物种间的动力学，例如吸引束缚的费米子原子对的隧穿。
英文摘要：
We study the quantum dynamics of strongly interacting few-boson mixtures in one-dimensional traps. If one species is strongly localized compared to the other (e.g., much heavier), it can serve as an effective potential barrier for that mobile component. Near the limit of infinite localization, we map this to a system of identical bosons in a double well. For realistic localization, the backaction of the light species on the "barrier" atoms is explained--to lowest order--in terms of an induced attraction between these. Even in equilibrium, this may outweigh the bare intra-species interaction, leading to unexpected correlated states. Remarkably, the backaction drastically affects the inter-species dynamics, such as the tunneling of an attractively bound pair of fermionized atoms.
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