Matteo Paoluzzi - IPCF-CNR #
Active particles in speckle patterns #
The random energy landscapes developed by speckle fields 
can be used to confine and manipulate a large number 
of micro-particles with a single laser beam. By means of 
molecular dynamics simulations, we investigate the 
static and dynamic properties of an active suspension 
of swimming bacteria embedded into speckle patterns. 
Looking at the correlation of the density fluctuations 
and the equilibrium density profiles, we observe a 
crossover phenomenon when the forces exerted by 
the speckles are equal to the bacteria's propulsion.