近日，日本电气通信大学的Hiroki Saito及其研究团队取得一项新进展。他们对自旋-1和自旋-2玻色-爱因斯坦凝聚混合物的相分离和亚稳态进行了研究。相关研究成果已于2024年9月25日在国际知名学术期刊《物理评论A》上发表。

该研究团队研究了由铷-87原子的自旋-1和自旋-2玻色-爱因斯坦凝聚体，组成混合物的基态和动力学行为。

对于实验测得的相互作用系数，基态表现出自旋-1铁磁态与自旋-2向列态之间的相分离。

在两者界面处，出现了一个部分极化的自旋态。自旋-1极化态与自旋-2双轴向列态的均匀混合态是亚稳的，且可通过局部扰动触发经成核过程发生的相分离。

附：英文原文

Title: Phase separation and metastability in a mixture of spin-1 and spin-2 Bose-Einstein condensates

Author: Uyen Ngoc Le, Hieu Binh Le, Hiroki Saito

Issue&Volume: 2024/09/25

Abstract: We investigate the ground state and dynamics of a mixture of spin-1 and spin-2 Bose-Einstein condensates of  ⁸⁷ Rb atoms. For the experimentally measured interaction coefficients, the ground state exhibits phase separation between the spin-1 ferromagnetic state and the spin-2 nematic state. At the interface between them, a partially polarized spin state emerges. The uniformly mixed state of the spin-1 polar state and spin-2 biaxial nematic state is metastable, and the phase separation via nucleation can be triggered by a local disturbance.

DOI: 10.1103/PhysRevA.110.033328

Source: https://journals.aps.org/pra/abstract/10.1103/PhysRevA.110.033328