2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/147563We consider conditions for existence of fermionic quasiparticles in a strongly anisotropic quasi-one-dimensional metal. The adopted model is a model of chains of spin-1/2 Luttinger liquid coupled by small interchain hopping. It is shown that the Luttinger liquid becomes more stable with decrease of the lattice coordination number. It is also shown that with a significant spin-charge separation some Luttinger liquid features may persist in the Fermi liquid phase.The calculations for spinless Luttinger liquid (LL) are replaced by the ones for spin-1/2 LLCondensed Mattertext