Dynamics of active membranes with internal noise
نویسندگان
چکیده
منابع مشابه
Dynamics of active membranes with internal noise
– We study the time-dependent height fluctuations of an active membrane containing energy-dissipating pumps that drive the membrane out of equilibrium. Unlike previous investigations based on models that neglect either curvature couplings or random fluctuations in pump activities, our formulation explores two new models that take both of these effects into account. In the first model, the magni...
متن کاملAdhesion of membranes with active stickers.
We consider a theoretical model for membranes with adhesive receptors, or stickers, that are actively switched between two conformational states. In their "on" state, the stickers bind to ligands in an apposing membrane, whereas they do not interact with the ligands in their "off" state. We show that the adhesiveness of the membranes depends sensitively on the rates of the conformational switch...
متن کاملInternal states of active inclusions and the dynamics of an active membrane.
A theoretical model of a two-component fluid membrane containing lipids and two-state active inclusions is presented. This model predicts several nonequilibrium morphology transitions. (i) Active pumping of the inclusions can drive a long-wavelength undulation instability. (ii) Active excitation of the inclusions can induce aggregation of high-curvature excited inclusions. (iii) Active inclusio...
متن کاملQuenched noise and over-active sites in sandpile dynamics
– The dynamics of sandpile models are mapped to discrete interface equations. We study in detail the Bak-Tang-Wiesenfeld model, a stochastic model with random thresholds, and the Manna model. These sandpile models are, respectively, discretizations of the Edwards-Wilkinson equation with columnar, point-like and correlated quenched noise, with the constraint that the interface velocity is either...
متن کاملPolarizationless P Systems with Active Membranes
The subject of this paper is the continuation of the studies of P systems with active membranes without polarizations with the label-changing capacity of some rules. Rewriting and communication rules that do not change membrane labels can be applied either sequentially or in a maximally parallel way. We consider several classes of P systems and study their generative power. Particularly interes...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Europhysics Letters (EPL)
سال: 2005
ISSN: 0295-5075,1286-4854
DOI: 10.1209/epl/i2004-10494-8