Noise-induced spectral narrowing in nonlinear oscillators.

Dykmam, M. I. and Mannella, R. and McClintock, Peter V. E. and Soskin, Stanislav M. and Stocks, N. G. (1990) Noise-induced spectral narrowing in nonlinear oscillators. EPL, 18 (8). pp. 691-696. ISSN 0295-5075

Abstract

The spectral densities of the fluctuations of noise-driven underdamped nonlinear oscillators are discussed with particular reference to the large class of systems whose eigenfrequencies vary nonmonotonically with energy. It is shown by analogue electronic experiments and theoretically that, astonishingly, the widths of their spectral peaks can dometimes decrease with increasing noise intensity.