  Glass formers are in general classified as strong or fragile depending on
whether their relaxation rates follow Arrhenius or super-Arrhenius temperature
dependence. There are however notable exceptions such as water, which exhibit a
fragile-to-strong (FTS) transition and behave as fragile and strong
respectively at high and low temperatures. In this work, the FTS transition is
studied using a distinguishable-particle lattice model previously demonstrated
to be capable of simulating both strong and fragile glasses [Phys. Rev. Lett.
125, 265703 (2020)]. Starting with a bimodal pair-interaction distribution
appropriate for fragile glasses, we show that by narrowing down the energy
dispersion in the low-energy component of the distribution, a FTS transition is
observed. The transition occurs at a temperature at which the stretching
exponent of the relaxation is minimized, in agreement with previous molecular
dynamics simulations.
