中国物理B ›› 2011, Vol. 20 ›› Issue (12): 120504-120504.doi: 10.1088/1674-1056/20/12/120504

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Hyperchaotic behaviours and controlling hyperchaos in an array of RCL-shunted Josephson junctions

冯玉玲1, 姚治海1, 范健1, 李日明2   

  1. (1)Department of Physics, Science College, Changchun University of Science and Technology, Changchun 130022, China; (2)Department of Physics, Science College, Changchun University of Science and Technology, Changchun 130022, China;Department of Physics, University of Science, Unjong Strict, Pyongyang, DPR Korea
  • 收稿日期:2011-06-13 修回日期:2011-07-13 出版日期:2011-12-15 发布日期:2011-12-15

Hyperchaotic behaviours and controlling hyperchaos in an array of RCL-shunted Josephson junctions

Ri Ilmyong(李日明)a)b), Feng Yu-Ling(冯玉玲)a)†, Yao Zhi-Hai(姚治海)a), and Fan Jian(范健)a)   

  1. a Department of Physics, Science College, Changchun University of Science and Technology, Changchun 130022, China; Department of Physics, University of Science, Unjong Strict, Pyongyang, DPR Korea
  • Received:2011-06-13 Revised:2011-07-13 Online:2011-12-15 Published:2011-12-15

摘要: This paper deals with dynamical behaviours in an array composed of two resistive-capacitive-inductive-shunted (RCL-shunted) Josephson junctions (RCLSJJs) and a shunted resistor. Numerical simulations show that periodic, chaotic and hyperchaotic states can coexist in this array. Moreover, a scheme for controlling hyperchaos in this array is presented by adjusting the external bias current. Numerical results confirm that this scheme can be effectively used to control hyperchaotic states in this array into stable periodic states, and different stable periodic states with different period numbers can be obtained by appropriately choosing the intensity of the external bias current.

关键词: hyperchaos, controlling hyperchaos, array of RCL-shunted Josephson junctions, Lyapunov exponent

Abstract: This paper deals with dynamical behaviours in an array composed of two resistive-capacitive-inductive-shunted (RCL-shunted) Josephson junctions (RCLSJJs) and a shunted resistor. Numerical simulations show that periodic, chaotic and hyperchaotic states can coexist in this array. Moreover, a scheme for controlling hyperchaos in this array is presented by adjusting the external bias current. Numerical results confirm that this scheme can be effectively used to control hyperchaotic states in this array into stable periodic states, and different stable periodic states with different period numbers can be obtained by appropriately choosing the intensity of the external bias current.

Key words: hyperchaos, controlling hyperchaos, array of RCL-shunted Josephson junctions, Lyapunov exponent

中图分类号:  (Numerical simulations of chaotic systems)

  • 05.45.Pq
74.50.+r (Tunneling phenomena; Josephson effects)