doi:10.1103/PhysRevA.90.062321engAres, FilibertoEsteve, J.G.Falceto, FernandoEntanglement of several blocks in fermionic chainsART-2014-90758In this paper we propose an expression for the entanglement entropy of several intervals in a stationary state of a free, translational invariant Hamiltonian in a fermionic chain. We check numerically the accuracy of our proposal and conjecture a formula for the asymptotic behavior of principal submatrices of a Toeplitz matrix.2014http://zaguan.unizar.es/record/6083210.1103/PhysRevA.90.062321http://zaguan.unizar.es/record/60832oai:zaguan.unizar.es:60832info:eu-repo/grantAgreement/ES/DGA/E24-2info:eu-repo/grantAgreement/ES/FPI/C070-2014info:eu-repo/grantAgreement/ES/MINECO/FPA2012-35453PHYSICAL REVIEW A 90 (2014), 062321 [8 pp]by-nc-ndhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccess