Interface-mediated interactions: Entropic forces of curved membranes

Details Interface-mediated interactions: Entropic forces of curved membranes Interface-mediated interactions: Entropic forces of curved membranes

2010-11-04

arxiv.org/abs/1011.1221v2

Phys. Rev. E 83, 051921 (2011)

Physics

Condensed Matter

Soft Condensed Matter

11 pages, 5 figures; final version, as appeared in Phys. Rev. E

Scientific paper

10.1103/PhysRevE.83.051921

Particles embedded in a fluctuating interface experience forces and torques mediated by the deformations and by the thermal fluctuations of the medium. Considering a system of two cylinders bound to a fluid membrane we show that the entropic contribution enhances the curvature-mediated repulsion between the two cylinders. This is contrary to the usual attractive Casimir force in the absence of curvature-mediated interactions. For a large distance between the cylinders, we retrieve the renormalization of the surface tension of a flat membrane due to thermal fluctuations.

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