论文标题
二元玻色丝凝的极性子
Polarons in Binary Bose-Einstein Condensates
论文作者
论文摘要
Bose极地是通过杂质与Bose-Einstein冷凝物之间的相互作用形成的准颗粒。在本文中，我们使用广义的Bogoliubov变换得出了有效的FröhlichHamiltonian。有效的FröhlichHamiltonian包括两种有效相互作用：杂质密度（ID）耦合和杂质旋转（IS）耦合。此外，我们采用Lee-low-pines变异方法来研究由ID引起的玻色极性的相关特性，并且是耦合。这些特性包括基态能量，有效质量和虚拟声子的平均数量。我们的发现表明，由耦合到地面能量产生的贡献降低到可混杂的不认可边界附近的零。此外，IS耦合的增加会引起更多的虚拟声子，阻碍杂质的运动，并导致有效的Bose极性质量显着增加。
Bose polarons are quasiparticles formed through the interaction between impurities and Bose-Einstein condensates. In this paper, we derive an effective Fröhlich Hamiltonian using the generalized Bogoliubov transformation. The effective Fröhlich Hamiltonian encompasses two types of effective interactions: impurity-density (ID) coupling and impurity-spin (IS) coupling. Furthermore, we employ the Lee-Low-Pines variational approach to investigate the relevant properties of Bose polarons induced by the ID and IS coupling. These properties include the ground state energy, effective mass, and average number of virtual phonons. Our findings reveal that the contribution resulting from IS couplings to the ground energy decreases to zero near the miscible-immiscible boundary. Additionally, the increase of the IS coupling induces a greater number of virtual phonons, impeding the movement of impurities and leading to a significant increase in the effective mass of Bose polarons.
