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Chaotic Dynamics of a Josephson Junction with Nonlinear Damping |
| LI Fei1, PAN Chang-Ning2, ZHANG Dong-Xia1, TANG Li-Qiang1 |
| 1Department of Physics, Hunan University of Science and Technology, Xiangtan 411201 2School of Science, Hunan University of Technology, Zhuzhou 412008 |
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| Cite this article: |
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LI Fei, PAN Chang-Ning, ZHANG Dong-Xia et al 2010 Chin. Phys. Lett. 27 050501 |
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Abstract We study the chaotic dynamics of a Josephson junction with nonlinear damping. It is found that with the increasing dc bias the system undergoes a process from a biperiodical state to a chaotic one via a period-doubling route. Interestingly, when the value of the dc bias increases further, the number of the chaotic attractors also increases accordingly. These chaotic attractors appear one after another in different intervals and regions with time. Through a feedback controlling strategy the chaos can be effectively suppressed. We also find that the current between the two separated superconductors of the junction can increase or decrease monotonously with time in some parameter spaces.
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| Keywords:
05.45.Ac
05.45.Gg
85.25.Cp
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Received: 14 January 2010
Published: 23 April 2010
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