Fig. 2.
A schematic representation of the transition probabilities after the introduction of spatial heterogeneity or disorder. The probability of hopping from site u to v is given by Av,u. When λv,u is positive, the probability of jumping from u to v decreases, while the probability of staying put increases. When λv,u is negative, the opposite effect occurs with a decrease in the probability of staying, while increasing the jump probability from u to v. The parameter λu,v affects the transition probability from v to u and the probability of remaining at v in an equivalent manner.