论文标题

在被困的带电的玻色子冷凝水的混合物中分离

Phase separation in a mixture of trapped charged Bose-Einstein condensates

论文作者

Aksu, S. Seyyare, Subaşı, A. Levent, Ghazanfari, Nader

论文摘要

我们研究了两种相互作用的带电的玻色 - 因斯坦冷凝物的混合物的相分离构型及其旋转特性,但遭到磁盘和科比诺几何形状中的磁场。我们使用Gross-Pitaevskii和Thomas-Fermi近似值计算方位角和径向相分离构型的基态能量。我们表明,来自两种方法的实验相关系统参数的结果都很好地一致。两种几何形状中的不混合混合物具有相等的组分相互作用,有利于所有组合相互作用的方位角分离。只有内部分量相互作用的不平衡才能导致向径向相分离的过渡,为此,过渡对陷阱的形状敏感。我们将相图作为间和内部分量相互作用的函数提出。虽然径向相分离在圆盘几何形状中受到广泛偏爱,但方位角相分离对较窄的Corbino几何形状受到青睐。我们探讨了磁场下空间分离的冷凝物的旋转特性,研究其角动量和速度场。方位相分离的循环量化分解。在这种情况下,冷凝水的批量区域继续显示出超流动行为,而速度场则显示沿相边界的刚体行为。

We study the phase separation configurations and their rotational properties for a mixture of two interacting charged Bose-Einstein condensates subject to a magnetic field trapped in disc and Corbino geometries. We calculate the ground state energies of azimuthal and radial phase separation configurations using the Gross-Pitaevskii and the Thomas-Fermi approximations. We show that the results for experimentally relevant system parameters from both approaches are in good agreement. The immiscible mixture in both geometries with equal intracomponent interactions favors the azimuthal phase separation for all intercomponent interactions. Only an imbalance in the intracomponent interactions can result in a transition to the radial phase separation, for which the transition becomes sensitive to the shape of the trap. We present phase diagrams as a function of the inter and intracomponent interactions. While the radial phase separation is widely favoured in disc geometry, the azimuthal phase separation is favoured for narrower Corbino geometries. We explore the rotational properties of the spatially separated condensates under the magnetic field, studying their angular momenta and velocity fields. The quantization of circulation breaks down for the azimuthal phase separation. In this case, the bulk region of the condensate continues to display superfluid flow behavior whereas the velocity field shows a rigid body behavior along the phase boundaries.

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