Journal
EUROPEAN PHYSICAL JOURNAL B
Volume 86, Issue 5, Pages -Publisher
SPRINGER
DOI: 10.1140/epjb/e2013-31115-4
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Funding
- NSF of China [10972181, 11102157]
- Program for New Century Excellent Talents in University
- Shaanxi Project for Young New Star in Science and Technology
- NPU Foundation for Fundamental Research and New Faculty and New Area Project
- SRF for ROCS, SEM
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The stochastic resonance phenomenon induced by Levy noise in a second-order and under-damped bistable system is investigated. The signal-to-noise ratio for different parameters is computed by an efficient numerical scheme. The influences of the intensity and stability index of Levy noise, as well as the amplitude of external signal on the occurrence of stochastic resonance phenomenon are characterized. The results imply that higher signal amplitude not only enhances the output power spectrum of system but also promotes stochastic resonance, and a proper adjustment of noise intensity in a certain range enlarges the peak value of output power spectrum which is significant for stochastic resonance. Moreover, with an appropriate damping parameter, lowering the stability index leads to larger fluctuations of Levy noise, and further weakens the occurrence of the stochastic resonance.
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