标题： 微波驱动的玻色极化子在光场和声子场耦合下的竞争 显示英文标题

标题： Competition of light- and phonon-dressing in microwave-dressed Bose polarons

摘要： 我们从理论上研究了浸没在一维受限玻色气体中的自旋1/2杂质的稳态性质。 特别地，我们考虑了在外场下相干耦合的自旋态，其中只有一个自旋分量与浴相互作用，这使得可以轻度修饰杂质，并产生自旋依赖的浴-杂质相互作用。 通过与基于从头计算的多体模拟进行详细比较，我们证明复合系统可以用一个简化的有效哈密顿量准确描述。 后者建立在先前发展的无光修饰情况下的有效势方法基础上。 它可以用于提取由声子修饰引起的杂质能量、残余项、有效质量和非谐性。 研究表明，光修饰会增加极化子的残余项，使杂质摆脱声子激发，这是由于强自旋耦合作用的结果。 对于强排斥力——之前已被证明会触发动态玻色极化子衰减（称为时间正交灾难现象），我们解释说强光修饰稳定了排斥性的极化子修饰态。 我们的结果确立了有效哈密顿量框架作为探索强相互作用极化子系统的强大工具，并验证即将到来的实验实现。 显示英文摘要

摘要： We theoretically investigate the stationary properties of a spin-1/2 impurity immersed in a one-dimensional confined Bose gas. In particular, we consider coherently coupled spin states with an external field, where only one spin component interacts with the bath, enabling light dressing of the impurity and spin-dependent bath-impurity interactions. Through detailed comparisons with ab-initio many-body simulations, we demonstrate that the composite system is accurately described by a simplified effective Hamiltonian. The latter builds upon previously developed effective potential approaches in the absence of light dressing. It can be used to extract the impurity energy, residue, effective mass, and anharmonicity induced by the phononic dressing. Light-dressing is shown to increase the polaron residue, undressing the impurity from phononic excitations because of strong spin coupling. For strong repulsions-previously shown to trigger dynamical Bose polaron decay (a phenomenon called temporal orthogonality catastrophe), it is explained that strong light-dressing stabilizes a repulsive polaron-dressed state. Our results establish the effective Hamiltonian framework as a powerful tool for exploring strongly interacting polaronic systems and corroborating forthcoming experimental realizations.