Activity-induced isotropic-polar transition in active liquid crystals

Active fluids are intrinsically out-of-equilibrium systems due to the internal energy injection of active constituents. We show here that a transition from motion-less isotropic state towards flowing polar one can be possibly driven by sole through action polar-hydrodynamic interactions in absence an ad hoc free-energy which favors development ordered phase. In particular, we propose analytical argument and perform lattice Boltzmann simulations where appearance large temporal fluctuations fraction system is observed at point. Moreover, make use scale-to-scale analysis unveil transfer mechanism, proving elastic absorption plays relevant role overall dynamics system, contrary what reported previous works on usual gel theory this term could factually neglected.