  The conformational and dynamical properties of active Brownian polymers
embedded in a fluid depend on the nature of the driving mechanism, e.g.,
self-propulsion or external actuation of the monomers. Implementations of
self-propelled and actuated active Brownian polymers in a multiparticle
collision dynamics (MPC) fluid are presented, which capture the distinct
differences between the two driving mechanisms. The active force-free nature of
self-propelled monomers requires adaptations of the MPC simulation scheme, with
its streaming and collision steps, where the monomer self-propulsion velocity
has to be omitted in the collision step. Comparison of MPC simulation results
for active polymers in dilute solution with results of Brownian dynamics
simulations accounting for hydrodynamics via the Rotne-Prager-Yamakawa tensor
confirm the suitability of the implementation. The polymer conformational and
dynamical properties are analyzed by the static and dynamic structure factor,
and the scaling behavior of the latter with respect to the wave-number and time
dependence are discussed. The dynamic structure factor displays various
activity-induced temporal regimes, depending on the considered wave number,
which reflect the persistent diffusive motion of the whole polymer at small
wave numbers, and the activity-enhanced internal dynamics at large wave
numbers. The obtained simulation results are compared with theoretical
predictions.
