- Autor
- Eisler, Viktor
- Zimborás, Zoltán
- TitelEntanglement negativity in two-dimensional free lattice models
- Datei
- Persistent Identifier
- Erschienen inPhysical Review / B
- Band93
- Erscheinungsjahr2016
- Heft11
- LicenceCC-BY
- Download Statistik1607
- 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.
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