232 citations · 1.5k across the 43 of their papers we have counts for
11 papers · 1 filter
Effective tension and fluctuations in active membranes
Bastien Loubet, Udo Seifert, Michael Andersen Lomholt
We calculate the fluctuation spectrum of the shape of a lipid vesicle or cell exposed to a nonthermal source of noise. In particular we take into account constraints on the membran…
Ion pump activity generates fluctuating electrostatic forces in biomembranes
B. Loubet, M. A. Lomholt
We study the non-equilibrium dynamics of lipid membranes with proteins that actively pump ions across the membrane. We find that the activity leads to a fluctuating force distribut…
Dissimilar bouncy walkers
Michael A Lomholt, Ludvig Lizana, Tobias Ambjornsson
We consider the dynamics of a one-dimensional system consisting of dissimilar hardcore interacting (bouncy) random walkers. The walkers' (diffusing particles') friction constants x…
Elastic moderation of intrinsically applied tension in lipid membranes
Michael A. Lomholt, Bastien Loubet, John H. Ipsen
Tension in lipid membranes is often controlled externally, by pulling on the boundary of the membrane or changing osmotic pressure across a curved membrane. But modifications of th…
Applying a potential across a biomembrane: electrostatic contribution to the bending rigidity and membrane instability
Tobias Ambjornsson, Michael A. Lomholt, Per Lyngs Hansen
We investigate the effect on biomembrane mechanical properties due to the presence an external potential for a non-conductive non-compressible membrane surrounded by different elec…
Fluctuation spectrum of quasispherical membranes with force-dipole activity
Michael A. Lomholt
The fluctuation spectrum of a quasi-spherical vesicle with active membrane proteins is calculated. The activity of the proteins is modeled as the proteins pushing on their surround…
Mechanics of non-planar membranes with force-dipole activity
Michael A. Lomholt
A study is made of how active membrane proteins can modify the long wavelength mechanics of fluid membranes. The activity of the proteins is modelled as disturbing the protein surr…
Optimal target search on a fast folding polymer chain with volume exchange
Michael A. Lomholt, Tobias Ambjornsson, Ralf Metzler
We study the search process of a target on a rapidly folding polymer (`DNA') by an ensemble of particles (`proteins'), whose search combines 1D diffusion along the chain, Levy type…
Descriptions of membrane mechanics from microscopic and effective two-dimensional perspectives
Michael A. Lomholt, Ling Miao
Mechanics of fluid membranes may be described in terms of the concepts of mechanical deformations and stresses, or in terms of mechanical free-energy functions. In this paper, each…
A General Theory of Non-equilibrium Dynamics of Lipid-protein Fluid Membranes
Michael A. Lomholt, Per L. Hansen, Ling Miao
We present a general and systematic theory of non-equilibrium dynamics of multi-component fluid membranes, in general, and membranes containing transmembrane proteins, in particula…
Dynamics of shape fluctuations of quasi-spherical vesicles revisited
Ling Miao, Michael A. Lomholt, Jesper Kleis
In this paper, the dynamics of spontaneous shape fluctuations of a single, giant quasi-spherical vesicle formed of a single lipid species is revisited theoretically. A coherent phy…