2020/10/21 by Y. Duan, Yuxiong Duan, Y. M. Bidasyuk +1
Physics and Astronomy · #Angular momentum #Angular momentum coupling #Azimuthal quantum number #Bose–Einstein condensate #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Ground state #Hamiltonian (control theory) #Orbital angular momentum of light #Phase transition #Physics #Quantum mechanics #Quantum optics and atomic interactions #Quantum phase transition #Spinor #Strong Light-Matter Interactions #Total angular momentum quantum number #Vortex #Wave function #cond-mat.quant-gas
paper · pdf · doi:10.1103/physreva.102.063328
published as Phys. Rev. A 102, 063328 (2020)
arxiv created 2020/10/21 · openalex created_date 2020/10/29 · openalex publication_date 2020/12/24 · arxiv updated 2021/01/04 · openalex updated_date 2026/08/05
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 functions contain a complex vortex molecule. Such a 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.