5 papers
Modes of speciation in heterogeneous space
Martin Rost, Michael Lässig
Modes of speciation have been the subject of a century's debate. Traditionally, most speciations are believed to be caused by spatial separation of populations (allopatry). Recent…
Delocalization transitions of semi-flexible manifolds
Ralf Bundschuh, Michael Lassig
Semi-flexible manifolds such as fluid membranes or semi-flexible polymers undergo delocalization transitions if they are subject to attractive interactions. We study manifolds with…
The Upper Critical Dimension of the KPZ Equation
Michael Lassig, Harald Kinzelbach
The strong-coupling regime of Kardar-Parisi-Zhang surface growth driven by short-ranged noise has an upper critical dimension d_> less or equal to four (where the dynamic exponent…
Fermions in a random medium
Harald Kinzelbach, Michael Lassig
We study the continuum field theory for an ensemble of directed polymers r_i (t) in 1+d' dimensions that live in a medium with quenched point disorder and interact via short-ranged…
Exact Critical Exponents of the Staircase Model
Michael Lassig
The staircase model is a recently discovered one-parameter family of integrable two-dimensional continuum field theories. We analyze the novel critical behavior of this model, seen…