Intersublattice entanglement entropy as an extensive property in antiferromagnets
EntityUAM. Departamento de Física Teórica de la Materia Condensada
PublisherAmerican Physical Society
10.1103/PhysRevB.104.064436Physical Review B 104.6 (2021): 064436
ISSN2469-9950 (print); 2469-9969 (online)
SubjectsAntiferromagnets; Classical Thermodynamics; Entanglement Entropy; Higher-Dimensional; One-Dimensional (1D) System; Sub-Lattices; Física
Rights© 2021 American Physical Society
Recent advancements in our understanding of ordered magnets call for a quantification of their entanglement content on an equal footing with classical thermodynamic quantities, such as the total magnetic moment. We evaluate the entanglement entropy (EE) between the two sublattices of a bipartite ordered antiferromagnet, finding it to scale with volume. Thus, the EE density becomes an intensive property and is evaluated to be a universal dimensionality-dependent constant when exchange is the dominant interaction. Our analytic results are validated against the DMRG-based analysis of a one-dimensional (1D) system, finding good agreement. Furthermore, our evaluated EE per bond provides a useful shortcut towards obtaining the central-cut EE in 1D, and the area law in higher-dimensional magnets
Google Scholar:Hartmann, Dion M.F. - Wouters, Jurriaan J. - Schuricht, Dirk - Duine, Rembert A. - Kamra, Akashdeep
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