Energy sharing induced by the nonlinear interaction |
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Institution: | 1. Physics Department of College of Applied Science, Taiyuan University of Science and Technology, Taiyuan 030024, China;
2. Institute of Theoretical Physics and Department of Physics, Shanxi University, Taiyuan 030006, China |
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Abstract: | Strong energy sharing is shown by numerically investigating coupled multi-component Bose-Einstein condensates (BECs) with a harmonic trap to simulate the Fermi-Pasta-Ulam model (FPU). For two-component BECs, the energy exchanging between each part, from regular, quantum beating to complete energy sharing, is explored by simulating their Husimi distributions, the time evolution of energies and the statistical entropy. Meanwhile, in the three-component case, a more complex energy sharing behavior is reported and a strong energy sharing is found. |
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Keywords: | Bose-Einstein condensates Fermi-Pasta-Ulam model Husimi distributions statistical entropy |
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