Measurement of correlations between elliptic and higher order flow in Pb+Pb collisions at $\sqrt{s_{\rm NN}}$=2.76 TeV with the ATLAS detector at the LHC

Measurements of the distributions of event-by-event flow harmonics $v_n$ and the correlations between harmonics $v_n$ and $v_m$ of different orders in $\sqrt{s_{NN}}$=2.76 TeV Pb+Pb collisions are presented. These measurements give insight into the nature of fluctuations in the initial geometry and the role of linear and non-linear hydrodynamic response to the fluctuations, the latter can introduce correlations between flow harmonics. The study of fluctuations is also extended by measurements of the rapidity dependent fluctuations in the $v_n$. Furthermore, the event-by-event fluctuations in the event shape is elucidated by jet-tomography studies, where the correlations between the $v_n$ of fully reconstructed jets and the $v_m$ of soft particles are measured. The latter directly probes the path-length dependent jet quenching response to the variation of the event-shape controlled by bulk particles.