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Leading models of galaxy formation require large-scale energetic outflows toregulate the growth of distant galaxies and their central black holes. However,current observational support for this hypothesis at high redshift is mostlylimited to rare z>2 radio galaxies. Here we present Gemini-North NIFS IntregralField Unit (IFU) observations of the [O III]5007 emission from a z~2ultraluminous infrared galaxy (ULIRG; L_IR>10^12 L_sol) with an opticallyidentified Active Galactic Nucleus (AGN). The spatial extent (~4-8 kpc) of thehigh velocity and broad [O III] emission are consistent with that found in z>2radio galaxies, indicating the presence of a large-scale energetic outflow in agalaxy population potentially orders of magnitude more common than distantradio galaxies. The low radio luminosity of this system indicates thatradio-bright jets are unlikely to be responsible for driving the outflow.However, the estimated energy input required to produce the large-scale outflowsignatures (of order ~10^59 ergs over ~30 Myrs) could be delivered by a windradiatively driven by the AGN and/or supernovae winds from intense starformation. The energy injection required to drive the outflow is comparable tothe estimated binding energy of the galaxy spheroid, suggesting that it canhave a significant impact on the evolution of the galaxy. We argue that theoutflow observed in this system is likely to be comparatively typical of thehigh-redshift ULIRG population and discuss the implications of theseobservations for galaxy formation models.

Revealing an Energetic Galaxy-Wide Outflow in a z~2 Ultraluminous Infrared Galaxy