Anomalous collective dynamics in optically driven colloidal rings

Yael Roichman, David G. Grier, George Zaslavsky

    Research output: Contribution to journalArticlepeer-review


    Three fluid-borne colloidal spheres circulating around a ringlike optical vortex trap have been predicted to undergo periodic collective motion due to their hydrodynamic coupling. In fact, the quenched disorder in an experimentally projected optical vortex drives a transition to a dynamical state characterized by power-law divergence of phase-space trajectories and collective fluctuations characterized by noninteger exponents. The observed relationship between scaling in the microscopic trajectories and macroscopic collective fluctuations is consistent with predictions for the onset of weak chaos within the experimentally accessible time window.

    Original languageEnglish (US)
    Article number020401
    JournalPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
    Issue number2
    StatePublished - Feb 6 2007

    ASJC Scopus subject areas

    • Statistical and Nonlinear Physics
    • Statistics and Probability
    • Condensed Matter Physics


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