Category Archives: Post

Polymers and filaments in confined geometries

Imagine the filaments forming the cytoskeleton of a cell.  They are confined within the cell membrane.  Not only do these filaments influence how the cell might  behave mechanically, but how the filaments behave is coupled to the restricted space in which they grow, arrange or combine into networks.  Similarly one can think of polymers inside… Read More »

Active systems

Molecular machines are responsible for a variety of non-equilibrium actions. They can make cells themselves move about, and perhaps exhibit fascinating collective motion, and the are responsible, amongst other things, for the transportation of cargo, or play a role in the tightening of the contractile ring during cells division. A range of molecular motors move… Read More »

Dealing with entanglements

Our recent paper (See post here; CM Rohwer, KK Müller-Nedebock “Operator Formalism for Topology-Conserving Crossing Dynamics in Planar Knot Diagrams”, Journal of Statistical Physics 159, 120-157 (2015), http://dx.doi.org/10.1007/s10955-014-1161-1) introduces a dynamical perspective to the venerable polymer physics problem of conserving the state of entanglement in polymer loops. To understand what this means we show the example of a single… Read More »