External noise-induced transitions in a current-biased Josephson junction
- School of Mathematics and Physics, Yancheng Institute of Technology, Yancheng 224051 (China)
- College of Mechanical and Vehicle Engineering, Hunan University, Changsha 410082 (China)
We investigate noise-induced transitions in a current-biased and weakly damped Josephson junction in the presence of multiplicative noise. By using the stochastic averaging procedure, the averaged amplitude equation describing dynamic evolution near a constant phase difference is derived. Numerical results show that a stochastic Hopf bifurcation between an absorbing and an oscillatory state occurs. This means the external controllable noise triggers a transition into the non-zero junction voltage state. With the increase of noise intensity, the stationary probability distribution peak shifts and is characterised by increased width and reduced height. And the different transition rates are shown for large and small bias currents.
- OSTI ID:
- 22492413
- Journal Information:
- AIP Advances, Vol. 6, Issue 1; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 2158-3226
- Country of Publication:
- United States
- Language:
- English
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