论文标题
不混溶混合物中量子气泡的异常浮力
Anomalous buoyancy of quantum bubbles in immiscible Bose mixtures
论文作者
论文摘要
浮力是不存在的二元bose-Einstein冷凝物中众所周知的作用。取决于两个组件所经历的差分限制，一个组件的气泡坐在另一个组件的中心，最终漂浮到表面，它在其周围遍布整个或部分散布。我们讨论量子波动如何显着改变不混溶气泡的体积和位置。我们考虑了两个可混杂的成分的特殊情况，形成了具有增强的量子波动（量子气泡）的伪量表气泡冷凝物，并浸入由第三个成分提供的浴室中，它们是不混溶的。我们表明，在如此特殊的有效二元混合物中，量子波动改变了定义气泡体积和修改的压力的平衡，以及浮力的标准。一旦浮力设定，与平均场情况相反，量子波动可能会使气泡位于中心和表面之间的中间位置。在表面上，量子气泡可能会过渡到浮动的自结界液滴。
Buoyancy is a well-known effect in immiscible binary Bose-Einstein condensates. Depending on the differential confinement experienced by the two components, a bubble of one component sitting at the center of the other eventually floats to the surface, around which it spreads either totally or partially. We discuss how quantum fluctuations may significantly change the volume and position of immiscible bubbles. We consider the particular case of two miscible components, forming a pseudo-scalar bubble condensate with enhanced quantum fluctuations (quantum bubble), immersed in a bath provided by a third component, with which they are immiscible. We show that in such a peculiar effective binary mixture, quantum fluctuations change the equilibrium of pressures that define the bubble volume and modify as well the criterion for buoyancy. Once buoyancy sets in, in contrast to the mean-field case, quantum fluctuations may place the bubble at an intermediate position between the center and the surface. At the surface, the quantum bubble may transition into a floating self-bound droplet.
