Allows for the calculation of coupled elecron-photon problems by applying the dressed orbital approach. Details can be found in https://arxiv.org/abs/1812.05562 At the moment, N electrons in d (<=3) spatial dimensions, coupled to one photon mode can be described. The photon mode is included by raising the orbital dimension to d+1 and changing the particle interaction kernel and the local potential, where the former is included automatically, but the latter needs to by added by hand as a user_defined_potential! Coordinate 1-d: electron; coordinate d+1: photon.
poisson/poisson.F90 : 201
call parse_variable(namespace, 'DressedOrbitals', .false., this%is_dressed)