Energy relaxation of exciton-polariton condensates in quasi-one-dimensional microcavities

C.A. and G.T. acknowledge financial support from Spanish FPU and FPI scholarships, respectively. P.S. acknowledges Greek GSRT program “ARISTEIA” (1978) for financial support. The work was partially supported by the Spanish MEC MAT2011-22997, CAM (S-2009/ESP-1503), and FP7 ITN’s “Clermont4” (235114), “Spin-optronics” (237252), and INDEX (289968) projects