Related papers: Entanglement entropies of an interval for the massless scalar field in the presence of a boundary

Entanglement entropies of an interval for the massless scalar field in the presence of a boundary

URL: http://arxiv.org/abs/2308.00614v1
Date: Tue, 1 Aug 2023 15:43:09 GMT
Title: Entanglement entropies of an interval for the massless scalar field in the presence of a boundary
Authors: Benoit Estienne, Yacine Ikhlef, Andrei Rotaru, Erik Tonni
Abstract summary: We study the entanglement entropies of an interval for the massless compact boson either on the half line or on a finite segment. The method of the branch point twist fields is employed to obtain analytic expressions for the two-point functions of twist operators.
Score: 0.0
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: We study the entanglement entropies of an interval for the massless compact boson either on the half line or on a finite segment, when either Dirichlet or Neumann boundary conditions are imposed. In these boundary conformal field theory models, the method of the branch point twist fields is employed to obtain analytic expressions for the two-point functions of twist operators. In the decompactification regime, these analytic predictions in the continuum are compared with the lattice numerical results in massless harmonic chains for the corresponding entanglement entropies, finding good agreement. The application of these analytic results in the context of quantum quenches is also discussed.

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