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- Felix Höfling, Thomas Franosch
- Reports on progress in physics. Physical Society
- 2010

A ubiquitous observation in cell biology is that the diffusive motion of macromolecules and organelles is anomalous, and a description simply based on the conventional diffusion equation with diffusion constants measured in dilute solution fails. This is commonly attributed to macromolecular crowding in the interior of cells and in cellular membranes,… (More)

- Peter H. Colberg, Felix Höfling
- Computer Physics Communications
- 2011

Modern graphics processing units (GPUs) provide impressive computing resources, which can be accessed conveniently through the CUDA programming interface. We describe how GPUs can be used to considerably speed up molecular dynamics (MD) simulations for system sizes ranging up to about 1 million particles. Particular emphasis is put on the numerical… (More)

- Felix Höfling, Thomas Franosch, Erwin Frey
- Physical review letters
- 2006

The localization transition and the critical properties of the Lorentz model in three dimensions are investigated by computer simulations. We give a coherent and quantitative explanation of the dynamics in terms of continuum percolation theory and obtain an excellent matching of the critical density and exponents. Within a dynamic scaling ansatz… (More)

- Felix Höfling, Thomas Franosch
- Physical review letters
- 2007

The long-time behavior of transport coefficients in a model for spatially heterogeneous media in two and three dimensions is investigated by molecular dynamics simulations. The behavior of the velocity autocorrelation function is rationalized in terms of a competition of the critical relaxation due to the underlying percolation transition and the… (More)

<lb>For a continuum percolation model, it has been shown recently that the crossover<lb>from pure subdiffusion to normal diffusion extends over five decades in time [1, 2]; in<lb>addition, the asymptotic behavior is slowly approached and the large corrections cannot<lb>simply be ignored. Thus, it is of general interest to develop a systematic description… (More)

- Felix Höfling
- 2007

The localization transition and the critical properties of the Lorentz model in three dimensions are investigated by computer simulations. We give a coherent and quantitative explanation of the dynamics in terms of continuum percolation theory and obtain an excellent matching of the critical density and exponents. Within a dynamic scaling Ansatz… (More)

- Felix Höfling, Tobias Munk, Erwin Frey, Thomas Franosch
- The Journal of chemical physics
- 2008

The dynamic properties of a classical tracer particle in a random, disordered medium are investigated close to the localization transition. For Lorentz models obeying Newtonian and diffusive motion at the microscale, we have performed large-scale computer simulations, demonstrating that universality holds at long times in the immediate vicinity of the… (More)

- T. Munk, F. Höfling
- 2008

Slender rods in concentrated suspensions constitute strongly interacting systems with rich dynamics: transport slows down drastically and the anisotropy of the motion becomes arbitrarily large. We develop a mesoscopic description of the dynamics down to the length scale of the interparticle distance. Our theory is based on the exact solution of the… (More)

- Felix Höfling, Erwin Frey, Thomas Franosch
- Physical review letters
- 2008

The transport of an infinitely thin, hard rod in a random, dense array of point obstacles is investigated by molecular dynamics simulations. Our model mimics the sterically hindered dynamics in dense needle liquids. Transport becomes increasingly fast at higher densities, and we observe a power-law divergence of the diffusion coefficient with exponent 0.8.… (More)

- Felix Höfling, Tobias Munk, Erwin Frey, Thomas Franosch
- Physical review. E, Statistical, nonlinear, and…
- 2008

Entangled networks of stiff biopolymers exhibit complex dynamic response, emerging from the topological constraints that neighboring filaments impose upon each other. We propose a class of reference models for entanglement dynamics of stiff polymers and provide a quantitative foundation of the tube concept for stiff polymers. For an infinitely thin needle… (More)