The ATLAS detector is one of two multipurpose experiments that is currently exploring the high-energy frontier in proton collisions at the LHC. Up to now data have been recorded at energies of 7 and 8 TeV, in future the LHC will collide protons at energies of 13 to 14 TeV.
I will review ATLAS searches for dark-matter candidates with a focus on monojet and monophoton signatures. Such final states have recently received a lot of phenomenological attention, as they can be interpreted as dark-matter pair production accompanied by a jet or a photon radiated off the initial state. This interpretation relies on an effective field-theory approach, which allows to compare the ATLAS accelerator results to measurements of direct or indirect searches for dark matter. I will show and discuss such comparisons, and mention future plans for combined searches for dark matter.
