Combining two Bose-Einstein condensates (BECs) may result in a miscible or immiscible mixture, or even a violent implosion. We theoretically demonstrate that dipolar two-component BECs produce far richer physics than their nondipolar counterparts. Intriguingly, when both components have equivalent dipoles, the transition to immiscibility is largely unaffected by dipolar physics, yet the dipoles maximally affect stability. Conversely, antiparallel dipoles strongly affect miscibility but have little effect on stability. By performing three-dimensional calculations of the ground states and their excitations, we find strong dependencies on the confinement geometry. We explore and elucidate the various phononic and rotonic phase transitions, as well as symmetry-preserving crossovers.

中文翻译：

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偶极玻色子混合物的混溶性和稳定性

结合两种玻色-爱因斯坦凝聚物 (BEC) 可能会导致混溶或不混溶的混合物，甚至发生剧烈的内爆。我们从理论上证明，偶极双组分 BEC 产生比非偶极对应物更丰富的物理学。有趣的是，当两个组件具有等效的偶极子时，向不混溶的转变在很大程度上不受偶极物理学的影响，但偶极子最大程度地影响稳定性。相反，反平行偶极子强烈影响混溶性，但对稳定性几乎没有影响。通过对基态及其激发进行三维计算，我们发现对限制几何的强烈依赖性。我们探索并阐明了各种声子和旋转相变，以及保持对称性的交叉。