Physics potential of ATLAS detector with high luminosity

The ATLAS experiment is designed to exploit the full physics discovery potential in the TeV energy region opened up by the Large Hadron Collider at a center of mass energy of 14 TeV with very high luminosities ($10^{34}-10^{35} \ cm^{-2} s^{-1}$). We present some examples of ATLAS physics reach at the LHC based on the detail simulations of the ATLAS detector's response for a selection of electroweak, extra-dimension, and new strong force physics processes. The examples were chosen to demonstrate the great discovery potential of the ATLAS experiment at high and very high luminosities, as well as for their intrinsic physics interest. We also present that the high luminosities of the LHC will allow to perform high precision measurements with the ATLAS experiment to search for deviations from the predictions of the Standard Model which signal its breakdown.