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Noise-induced spectral narrowing in nonlinear oscillators.

Research output: Contribution to journalJournal article


Journal publication date1990
JournalEurophysics Letters
Journal number8
Number of pages6
Original languageEnglish


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.