  Lecture notes for the Brazilian School on Statistical Mechanics, Natal,
Brazil, July 2011.
  The five lectures introduce to the description of entanglement in
many-particle systems and review the ground-state entanglement features of
standard solvable lattice models. This is done using a thermodynamic
formulation in which the eigenvalue spectrum of a certain Hamiltonian
determines the entanglement properties. The methods to obtain it are discussed
and results, both analytical and numerical, for various cases including time
evolution are presented.
