The embedding method beyond the single-channel case - Two-mode and Hubbard chains A. Freyn, G. Vasseur, P. Schmitteckert, D. Weinmann, G.-L. Ingold, R. A. Jalabert and J.-L. Pichard Eur. Phys. J. B, 75 2 (2010) 253-266 Published online: 19 May 2010 DOI: 10.1140/epjb/e2010-00153-y