Multichannel hyperspherical model for Efimov physics with van der Waals interactions controlled by a Feshbach resonance

Van der Waals interactions with soft interfaces

Many naturally occurring microbiological and synthetic polymer systems have soft interfaces due, e.g., to the presence of polymer brushes at the surfaces. The initial interactions (before contact) in such systems are typically physical rather than chemical in origin, e.g. electrostatic or van der Waals forces. We calculate the form of the summed van der Waals interaction energies UHS and USS be...

Tutorial 3: van der Waals Interactions

van der Waals interactions across stratified media.

Working at the Lifshitz level, we investigate the van der Waals interactions across a series of layers with a periodic motif. We derive the complete form of the van der Waals interaction as an explicit function of the number of periodic layers. We then compare our result with an approximation based on an anisotropic-continuum representation of the stratified medium. Satisfactory agreement betwe...

Scaling laws for van der Waals interactions in nanostructured materials

Van der Waals interactions have a fundamental role in biology, physics and chemistry, in particular in the self-assembly and the ensuing function of nanostructured materials. Here we utilize an efficient microscopic method to demonstrate that van der Waals interactions in nanomaterials act at distances greater than typically assumed, and can be characterized by different scaling laws depending ...

Optimal spline cutoffs for Coulomb and van der Waals interactions

Traditional spline cutoffs of the long-ranged Coulomb interaction gives large errors in the forces which lead to seriously distorted structures. These errors can be drastically reduced (by a factor of 7) by optimally adjusting the cutoffs parameters. Applying to a 453-atom dendrimer, the visibly distorted structure is improved substantially (the rms coordinate deviation is reduced from 1.15 to0...