  A search for new phenomena in events with a high-energy jet and large missing
transverse momentum is performed using data from proton-proton collisions at
sqrt(s)=7 TeV with the ATLAS experiment at the Large Hadron Collider. Four
kinematic regions are explored using a dataset corresponding to an integrated
luminosity of 4.7 inverse femtobarn. No excess of events beyond expectations
from Standard Model processes is observed, and limits are set on large extra
dimensions and the pair production of dark matter particles.
