Phase measurements of barrier crossings in a periodically modulated double-well potential

Yeonee Seol, D. L. Stein, Koen Visscher

    Research output: Contribution to journalArticle


    We report on the experimental observation of the phase angle of a particle escaping over a periodically modulated potential barrier. Optical tweezers and back-focal plane position detection were used to record particle trajectories in the entire double-well potential. These measurements provide a sensitive test of theories proposed in the past decade of escape driven by random thermal noise from a periodically modulated potential. The observed phase shifts as a function of modulation frequency are consistent with those calculated using existing theories.

    Original languageEnglish (US)
    Article number050601
    JournalPhysical Review Letters
    Issue number5
    StatePublished - Aug 6 2009


    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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