Abstract. Considering the time-delayed feedback and environmental perturbations in spin-crossover system,
we construct a stochastic delayed differential equation to study the state transitions from the low
spin (LS) state to the high spin (HS) state in spin-crossover solids. It is shown that the delayed feedback
and noise can induce optical bistability and state transitions. The mean first-passage time (MFPT) of the
transition from the LS state to the HS state as the function of the noise intensity exhibits a maximum,
and the noise-enhanced stability is observed. However the MFPT decreases with increase of the delayed
feedback intensity, thus the delayed feedback accelerates the conversion from the LS state to the HS state.

该成果发表在Eur. Phys. J. B (2013)上，DOI: 10.1140/epjb/e2013-40179-y

清样版本：

2013epjb.pdf