Top quark pair properties in the production and decays of $t\bar{t}$ events at ATLAS

In proton-proton collisions at the LHC, pairs of top and anti-top quarks are expected to be mostly produced through gluon fusion. Making use of the large number of top quark pairs collected, we present measurements of the Atlas experiment using $4.7 \textrm{ fb}^{-1}$ of data. First, we present a measurement of the charge asymmetry and compare it to different new physics models. Furthermore we show a measurement of the spin correlation between top and anti-top quarks using several variables and discuss their sensitivity to new physics. In addition, we present measurements of the top quark polarisation predicted in models with CP-conserving and CP-violating processes.