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Nonlinear Landau-Zener tunneling under biharmonic driving |
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| Authors: | Xiaobing Luo Senping LuoJun Xu Jinwang Chen |
| Institution: | a Department of Physics, Jinggangshan University, Ji’an 343009, China b Department of Mathematics, Jinggangshan University, Ji’an 343009, China c Center of Experimental Teaching for Common Basic Courses, South China Agriculture University, Guangzhou 510642, China |
| Abstract: | We address the response of a two-mode Bose-Einstein condensate to a biharmonic high-frequency driving field that directly couples the two mode. By use of a high-frequency approximation we find that asymmetric biharmonic high-frequency driving yields new effects on Nonlinear Landau-Zener tunneling as compared to a symmetric off-diagonal modulation. In particular, we detect an unclosed loop structure and the disappearance of the energy level below the loop structure. |
| Keywords: | Bose-Einstein condensate Landau-Zener process Off-diagonal driving |
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