  We compare a perturbative QCD-based jet-energy loss model to the measured
data of the pion nuclear modification factor and the high-pT elliptic flow at
RHIC and LHC energies. This jet-energy loss model (BBMG) is currently coupled
to state-of-the-art hydrodynamic descriptions. We report on a model extension
to medium backgrounds generated by the parton cascade BAMPS. In addition, we
study the impact of realistic medium transverse flow fields and a jet-medium
coupling which includes the effects of the jet energy, the temperature of the
bulk medium, and non-equilibrium effects close to the phase transition. By
contrasting the two different background models, we point out that the
description of the high-pT elliptic flow for a non-fluctuating medium requires
to include such a jet-medium coupling and the transverse flow fields. While the
results for both medium backgrounds show a remarkable similarity, there is an
impact of the background medium and the background flow on the high-pT elliptic
flow.
