We study a quantum many-body system of attracting bosons confined in a ring-shaped potential and interrupted by a weak link. With such architecture, the system defines atomtronic quantum interference devices harnessing quantum solitonic currents. We demonstrate that the system is characterized by the specific interplay between the interaction and the strength of the weak link. In particular, we find that, depending on the operating conditions, the current can be a universal function of the relative size between the strength of the impurity and interaction. The low lying many-body states are studied through a quench dynamical protocol that is the atomtronic counterpart of Rabi interferometry. With this approach, we demonstrate how our system defines a two level system of coupled solitonic currents. The current states are addressed through the analysis of the momentum distribution.

我们研究了一种吸引玻色子的量子多体系统，该玻色子被限制在环形势中并被弱链接中断。通过这种架构，该系统定义了利用量子孤子电流的原子量子干涉装置。我们证明了该系统的特点是相互作用和薄弱环节的强度之间的特定相互作用。特别是，我们发现，根据操作条件，电流可以是杂质强度和相互作用之间的相对大小的通用函数。低位多体状态通过淬火动力学协议进行研究，该协议是 Rabi 干涉测量的原子对应物。通过这种方法，我们演示了我们的系统如何定义耦合孤子电流的两级系统。