Effects of correlation time between noises on the noise enhanced stability phenomenon in an asymmetric bistable system |
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Authors: | Chun Li Zheng-Lin Jia Dong-Cheng Mei |
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Institution: | 1. Department of Computer Science, Puer College, Puer 665000, China
2. Department of Physics, Yuxi Normal University, Yuxi 653100, China
3. Department of Physics, Yunnan University, Kunming 650091, China |
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Abstract: | The effects of the correlation time τ between noises on the noise-enhanced stability (NES) phenomenon in an asymmetric bistable system driven by cross-correlated noise are investigated. The expressions for the average escape time from the left metastable state TL and from the right metastable state TRare derived. The results indicate that: i) The NES effect is suppressed as the correlation time τ increases for two metastable states; ii) The increase in τ speeds up the escape process from the right state for positively correlated noise, whereas its role is reverses for negatively correlated; iii) In the escape process from the left state, the role of τ is opposite to that in escape from the right state. |
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Keywords: | asymmetric bistable system noise correlation time noise enhanced stability |
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