The Fluctuation of Bistability in Chemical Reactions

In this paper, the fluctuation of the bistability chemical reactions system is studied. The fluctuation is always very small except in the narrow region, where we find a remarkable peak at the equal-probability point. This behavior is easily understood by the approximation of probability distribution. It is revealed that the behavior at the equal-probability point, like the first-order transitions in equilibrium systems, possesses the feature of first-order-like transitions.