IFEG   20353
INSTITUTO DE FISICA ENRIQUE GAVIOLA
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
KPZ as a stochastic gradient flow in an evolving lnadscape
Autor/es:
WIO, HORACIO; REVELLI, JORGE A.; DEZA, R. R
Lugar:
Bariloche
Reunión:
Congreso; TREFEMAC; 2016
Resumen:
The deterministic KPZ equation has been recently formulated as a gradient flow. Its nonequilibrium analogof a free energy - providing at time t the landscape where the stochastic dynamics of h(x, t) takes place - ishowever unbounded, and its exact evaluation involves all the detailed histories leading to h(x, t) from some initialconfiguration h0(x, 0). After pinpointing some implications of these facts, we study the time behavior of the firstfew moments of [h] and show the interesting consequences of its structure when an external driving force F isincluded. The asymptotic form of the time derivative ˙ [h] is shown to be valid for any substrate dimensionalityd, thus providing a valuable tool for studies in d > 1.