论文标题
在玻色 - 玻璃混合物中的排斥层子的呼吸模式
Breathing modes of repulsive polarons in Bose-Bose mixtures
论文作者
论文摘要
我们认为杂质原子嵌入了两个成分的玻色子凝结物中，以准确的尺寸状态。我们通过通过数值求解基本耦合的毛 - 斑杆菌方程来研究杂质和玻色种之间排斥耦合对系统平衡的影响。我们的结果表明，由于杂质和两个冷凝物的相互作用，杂质的存在可能导致不可证实的不明相变。在Bogoliubov-De Gennes方程的领域内，我们计算了由于不同类型的相互作用而导致的量子波动。在可混杂的情况下，使用各种和数值手段深入讨论了均匀和非均匀二元冷凝物中呼吸模式和和谐捕获的杂质的时间演变。我们特别表明，被困的玻色混合物的自我捕获，混溶性和不均匀性可能会强烈改变杂质的低洼激动和动力学特性。均匀的玻色混合物中语音子的存在导致呼吸震荡宽度宽度的阻尼。
We consider impurity atoms embedded in a two-component Bose-Einstein condensate in a quasi-one dimensional regime. We study the effects of repulsive coupling between the impurities and Bose species on the equilibrium of the system for both miscible and immiscible mixtures by numerically solving the underlying coupled Gross-Pitaevskii equations. Our results reveal that the presence of impurities may lead to a miscible-immiscible phase transition due to the interaction of the impurities and the two condensates. Within the realm of the Bogoliubov-de Gennes equations we calculate the quantum fluctuations due to the different types of interactions. The breathing modes and the time evolution of harmonically trapped impurities in both homogeneous and inhomogeneous binary condensates are deeply discussed in the miscible case using variational and numerical means. We show in particular that the self-trapping, the miscibility and the inhomogeneity of the trapped Bose mixture may strongly modify the low-lying excitations and the dynamical properties of impurities. The presence of phonons in the homogeneous Bose mixture gives rise to the damping of breathing oscillations of impurities width.
