Pw. Bates et A. Chmaj, An integrodifferential model for phase transitions: Stationary solutions in higher space dimensions, J STAT PHYS, 95(5-6), 1999, pp. 1119-1139
We study the existence and stability of stationary solutions of an integrod
ifferential model for phase transitions, which is a gradient flow for a fre
e energy functional with general nonlocal integrals penalizing spatial nonu
niformity. As such, this model is a nonlocal extension of the Allen-Cahn eq
uation, which incorporates long-range interactions. We find that the set of
stationary solutions for this model is much larger than that of the Allen-
Cahn equation.