题    目：Spontaneous Skyrmion Formation and Dynamics in a Two-Component Bose Einstein Condensate

主讲人：Rabeea Kiran

单    位：日本电气通信大学

时    间：2024年12月04日 18:00

ZOOM：713 668 5659

密    码： 123456

摘    要：Advancements in magnetic and optical techniques allow for precise spin manipulation in Bose-Einstein condensates (BECs). Consequently, BECs with spin degrees of freedom serve as an ideal platform for studying topological structures such as skyrmions. Both theoretical and experimental studies have focused on creating three-dimensional (3D) skyrmions in multicomponent BECs, with various methods proposed for generating these structures. In this study, we investigate the spontaneous generation of 3D skyrmions in a two-component BEC confined in a harmonic trap, along with their dynamical properties. We propose a method for creating linked vortex rings and generating 3D skyrmions from unstable overlapped vortex rings in two components. By numerically solving the Gross-Pitaevskii Equation, we show that the spontaneous generation of skyrmions in a two-component BEC is obtained depending on the inter-atomic interaction parameter. Notably, we find a specific range of interaction parameter for such dynamics. The parameter range for skyrmion generation is confirmed through Bogoliubov analysis. Additionally, we have performed numerical simulations using realistic parameters, suggesting that this phenomenon is experimentally feasible.

简    介：Rabeea Kiran is a graduate student at the University of Electro-Communications, Tokyo, Japan.