  Polariton condensates propagation is strongly dependent on the particular
energy landscape the particles are moving upon, in which the geometry of the
pathway laid for their movement plays a crucial role. Bends in the circuits
trajectories affect the condensates speed and oblique geometries introduce an
additional discretization of the polaritons momenta due to the mixing of short
and long axis wavevectors on the propagating eigenvalues. In this work, we
study the nature of the propagation of condensates along the arms of a
polariton coupler, by a combination of time-resolved micro-tomography
measurements and a theoretical model based on a mean field approximation where
condensed polaritons are described by an equation for the slow varying
amplitude of the polariton field coupled to an equation for the density of
incoherent excitons.
