The nonequilibrium phase transition and the symmetry revival induced by time delay in an asymmetric bistable system with correlated noises |
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Authors: | Long Fei Du Lu-Chun and Mei Dong-Cheng |
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Institution: | Department of Physics, Yunnan University, Kunming 650091, China |
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Abstract: | The nonequilibrium phase transition and the symmetry
revival induced by time delay in a bistable system are investigated.
The stationary probability distribution function (SPDF) of the
bistable system with time delay and correlated noises are calculated
by an analytical method and stochastic simulation respectively. The
analytical and simulative results indicate that: (1) There is a
certain value of λ (λ denotes the strength of
correlations between the multiplicative and additive noises) to make
the SPDF symmetric under some time delay; however, above or below
the given value, the symmetry will be broken; (2) With the
monotonic change of λ , the unimodal peak structure of SPDF
becomes bimodal at the beginning, then it becomes unimodal again; this
means that there is a reentrance phenomenon in the process; (3)
There is a critical value of delay time, which makes the lower peak
of SPDF equal to the higher one under the critical condition. This
means that the symmetry revival phenomenon emerges. |
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Keywords: | asymmetric bistable system time delay nonequilibrium
phase transition symmetry revival |
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