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We investigate nuclear suppression and elliptic flow in A+A reactions usingGyulassy-Levai-Vitev (GLV) radiative energy loss with the covariant transportMPC for bulk medium evolution. At both RHIC and LHC energies, we find thatinclusion of realistic transverse expansion for the medium strongly suppresseselliptic flow at high p_T compared to calculations with longitudinal Bjorkenexpansion only. We argue that this is a generic feature of GLV energy loss.Transverse expansion also enhances the high-p_T suppression, while fluctuationsin energy loss with the rescattering location of the jet parton in the mediumlead to weaker suppression and smaller elliptic flow. However, unlike thestrong reduction of elliptic flow with transverse expansion, these lattereffects get nearly washed out once calculations are adjusted to reproduce R_AAin central collisions.

High-pT suppression and elliptic flow from radiative energy loss with realistic bulk medium expansion