论文标题
与旋转轨道 - 角摩膜偶联的玻色 - 因斯坦冷凝水中的对称性断裂和相变
Symmetry breaking and phase transitions in Bose-Einstein condensates with spin-orbital-angular-momentum coupling
论文作者
论文摘要
提出了针对纺纱玻璃体冷凝水的理论研究，其两个组分是通过与不同轨道角矩的共磁拉曼束结合的。根据原子光耦合强度，该研究的重点是该冷凝物的基态的行为。通过分析基态，我们已经确定了许多量子相，这些量相反映了有效的哈密顿量的对称性，并以波函数的特定结构为特征。除了众所周知的条纹，极化和零摩膜阶段外，我们的结果还表明，该系统可以支持波函数，其波函数包含一个复杂的涡流分子。这种分子在系统的连续相变中起重要作用。可以使用当前现有技术在冷原子实验中检查涡旋 - 分子相的预测行为。
Theoretical study is presented for a spinor Bose-Einstein condensate, whose two components are coupled by copropagating Raman beams with different orbital angular momenta. The investigation is focused on the behavior of the ground state of this condensate, depending on the atom-light coupling strength. By analyzing the ground state, we have identified a number of quantum phases, which reflect the symmetries of the effective Hamiltonian and are characterized by the specific structure of the wave function. In addition to the well-known stripe, polarized and zero-momentum phases, our results show that the system can support phases, whose wave function contains a complex vortex molecule. Such molecule plays an important role in the continuous phase transitions of the system. The predicted behavior of vortex-molecule phases can be examined in cold-atom experiments using currently existing techniques.
