Measurements of diffractive physics and soft QCD at ATLAS

In this talk we present various measurements of diffractive physics and soft QCD processes performed using data collected by the ATLAS experiment at the LHC. Single diffractive processes (pp->pX) are studied reconstructing the particles from the dissociative system (X) with the ATLAS detector, while the intact proton is reconstructed and measured in a forward detector. If available, this talk will also present the underlying event measurements using strange particles as probes. Also in this talk, we present, If available, studies of correlation phenomena in order to study the dynamics of hadronization formation.