Author： Hömberg M. Müller M.
Publisher： Edp Sciences
E-ISSN： 1286-4854|97|6|68010-68010
ISSN： 0295-5075
Source： EPL (EUROPHYSICS LETTERS), Vol.97, Iss.6, 2012-03, pp. : 68010-68010
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Abstract
We determine the transverse dispersion relations of a lipid bilayer by generalizing the Seifert-Langer theory to include the bilayer's inertia and its surface tension. Thereby we extend the applicability of the original theory to computer simulations of lipid bilayers with and without solvent, as well as to simulations with and without momentum conservation. We calculate the asymptotic dispersion relations and identify conditions under which propagating modes occur. The theory is compared with simulations of a coarse-grained, solvent-free model, where we extract the transverse dispersion relations by fitting the intermediate scattering function of bilayer undulations. An estimate of the intermonolayer friction is obtained and compared with the result of a Green-Kubo relation.
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