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  • Autor
    • Eisler, Viktor
    • Zimborás, Zoltán
  • TitelEntanglement negativity in two-dimensional free lattice models
  • Volltext
  • Persistent Identifier
  • Erschienen inPhysical Review / B
  • Band93
  • Erscheinungsjahr2016
  • Heft11
  • LicenceCC-BY
  • ZugriffsrechteCC-BY
  • Download Statistik79
  • Peer ReviewJa
  • AbstractWe study the scaling properties of the ground-state entanglement between finite subsystems of infinite two-dimensional free lattice models, as measured by the logarithmic negativity. For adjacent regions with a common boundary, we observe that the negativity follows a strict area law for a lattice of harmonic oscillators, whereas for fermionic hopping models the numerical results indicate a multiplicative logarithmic correction. In this latter case we conjecture a formula for the prefactor of the area-law violating term, which is entirely determined by the geometries of the Fermi surface and the boundary between the subsystems. The conjecture is tested against numerical results and a good agreement is found.