Before revision:  We compute two deterministic quantities, the mean first exit time (MFET) and the first escape probability (FEP),  to examine the transition events from low to high concentration state under the influence of L\'evy noise.
After revision:  We compute two deterministic quantities, the mean first exit time (MFET) and the first escape probability (FEP), in order to examine the transition events from low to high concentration state under the influence of L\'evy noise.