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Periodic, Quasiperiodic and Chaotic q-Breathers in a Fermi-Pasta-Ulam Lattice |
XU Quan1,2, TIAN Qiang2 |
1Department of Physics, Daqing Normal University, Daqing 1637122Department of Physics, Beijing Normal University, Beijing 100875 |
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Cite this article: |
XU Quan, TIAN Qiang 2010 Chin. Phys. Lett. 27 020505 |
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Abstract We study the features of a single q-breather (SQB) in a Fermi-Pasta-Ulam lattice by the numerical method, and obtain that the stability of SQB correlates to coupling constant K and nonlinear parameter β. No matter whether K or β increases, the periodic SQB can be transformed into a quasiperiodic SQB or a chaotic SQB. We also obtain the conditions of excitation of periodic, quasiperiodic and chaotic SQBs.
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Keywords:
05.45.Xt
02.30.Jr
63.20.Pw
63.20.Ry
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Received: 21 October 2009
Published: 08 February 2010
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