K 79 Koverda, V. P. An origin of 1/f fluctuations at a nonequilibrium phase transition [] / V. P. Koverda, V. N. Skokov // Physica A. - 1999. - V. 262, N 3-4. - С. 376-387 Рубрики: ФИЗИКА Кл.слова (ненормированные): 1/f-NOISE -- NONEQUILIBRIUM PHASE TRANSITIONS -- HIGH-TEMPERATURE SUPERCONDUCTOR -- BOILING -- STOCHASTIC EQUATIONS -- FILMS Аннотация: We present the results of experimental study of an intensive source of wide-band 1/f noise whose generation appears in a system of two interacting nonequilibrium phase transitions. Such a process has been realized in the region of superposition of a superconductor-normal conductor phase transition on a liquid-vapor crisis transition in a boiling cooler. A mathematical model describing phase transitions in a dynamical system with two interacting order parameters, converting "white" noise into two stationary stochastic processes with 1/f and 1/f(2) spectra has been suggested. The properties of model oscillations with 1/f spectrum are qualitatively adequate to those observed in experiment. The characteristic difference of model oscillations with a 1/f(2) spectrum from classic random walks has also been noted |