Theory of activity-powered interfacial fluctuations

ORAL

Abstract

Motivated by experimental studies of the dynamics of active interfaces in microtubule-based active matter, we formulate a hydrodynamic model that describes the non-equilibrium fluctuations of soft interfaces observed in liquid-liquid phase separation. Numerical solution of the continuum equations reproduces different features of the interfacial dynamics observed in the experiments. Using this model ,we characterize the activity-induced roughening of the active-passive interface, highlighting the role of nonequilibrium active fluctuations.

*This work was supported by the NSF Grants DMR-1720256 (iSuperSeed).

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Presenters

  • Zhihong You

    • University of California, Santa Barbara

Authors

  • Zhihong You

    • University of California, Santa Barbara

  • Raymond Adkins

    • Physics, University of California, Santa Barbara
    • University of California, Santa Barbara

  • Itamar Kolvin

    • University of California, Santa Barbara

  • Sven Witthaus

    • University of California, Santa Barbara

  • Zvonimir Dogic

    • Physics, University of California, Santa Barbara
    • University of California, Santa Barbara
    • University of California at Santa Barbara, Santa Barbara
    • University of California, Santa Barbara, Harvard University, Brandeis University

  • M Cristina Marchetti

    • University of California, Santa Barbara
    • Department of Physics, University of California, Santa Barbara
    • Department of Physics, University of California
    • University of California Santa Barbara