direkt zum Inhalt springen

direkt zum Hauptnavigationsmenü

Sie sind hier

TU Berlin

Inhalt des Dokuments

Es gibt keine deutsche Übersetzung dieser Webseite.

Dynamical density functional theory for driven interacting particles in a ratchet potential

Held by Dr. Andrew Archer (Loughborough University, UK)

Abstract:
I will discuss the use of dynamical density functional theory (DDFT) to describe the transport of (Brownian) colloidal particles along a narrow channel, when they are driven along by a DC or low frequency AC external driving potential. In addition, the walls of the channel interact with the particles via a ratchet-like periodic potential. We consider particles which interact with each other via a pair potential having a hard-core repulsion plus an attractive tail. In the case of DC drive, we find that as the attraction strength between the colloids is increased beyond a critical value, the stationary density distribution of the particles loses its stability leading to depinning and a time-dependent density profile. Attraction induced symmetry breaking gives rise to the coexistence of stable stationary density profiles with different spatial periods and time-periodic density profiles, each characterized by different values for the particle current.

Zusatzinformationen / Extras

Direktzugang:

Schnellnavigation zur Seite über Nummerneingabe