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Abstract
We review the problem of heavy-quark diffusion in the Quark-Gluon Plasma and its ramifications
for heavy-quark spectra in heavy-ion collisions at RHIC. In particular, we attempt
to reconcile underlying mechanisms of several seemingly different approaches that
have been put forward to explain the large suppression and elliptic flow of non-photonic
electron spectra. We also emphasize the importance of a quantitative description of
the bulk medium evolution to extract reliable values for the heavy-quark diffusion
coefficient.