Entanglement entropy in quantum impurity systems and systems with boundaries

摘要: We review research on a number of situations where quantum impurity or physical boundary has an interesting effect entanglement entropy. Our focus is mainly as it occurs in one-dimensional systems with single boundary, particular spin models, but generalizations to higher dimensions are also reviewed. Recent advances the understanding spin-boson and Kondo models discussed along influence boundaries. Particular attention paid (1 + 1)-dimensional analytical results can be obtained for case conformally invariant conditions connection topological entropy made. New mixed presented. Analytical from Fermi liquid theory well several different recent definitions contribution