Numerical Simulations on Stationary States for Rotating Two-Component Bose-Einstein Condensates

作者：Wang Hanquan^*

来源：Journal of Scientific Computing, 2009, 38(2): 149-163.

DOI：10.1007/s10915-008-9225-5

• Gross-Pitaevskii equations
• Rotating two-component BECs
• Angular momentum rotation
• Continuous normalized gradient flows
• Stationary states

We numerically study stationary states such as ground, symmetric and central vortex states as well as their energy diagrams for rotating two-component Bose-Einstein condensates (BECs), which are stationary solutions of time-independent coupled Gross-Pitaevskii equations with an angular momentum rotational term. We compute these stationary states by using normalized gradient flows with a backward Euler finite difference discretization, which is proved to be efficient and accurate. By using this discretization, we find various ground state configurations with several vortices for the two-component BECs, which are novel but not found in rotating two-component BECs; we also find that the critical angular velocity at which the ground states lose symmetry.

• 出版日期2009-2
• 单位云南大学