Frustration, entanglement, and correlations in quantum many-body systems
- Autor(en)
- U. Marzolino, S. M. Giampaolo, F. Illuminati
- Abstrakt
We derive an exact lower bound to a universal measure of frustration in degenerate ground states of quantum many-body systems. The bound results in the sum of two contributions: entanglement and classical correlations arising from local measurements. We show that average frustration properties are completely determined by the behavior of the maximally mixed ground state. We identify sufficient conditions for a quantum spin system to saturate the bound, and for models with twofold degeneracy we prove that average and local frustration coincide.
- Organisation(en)
- Teilchenphysik
- Externe Organisation(en)
- Albert-Ludwigs-Universität Freiburg, Università degli Studi di Salerno, Consorzio Nazionale Interuniversitario per le Scienze Fisiche della Materia
- Journal
- Physical Review A
- Band
- 88
- Anzahl der Seiten
- 5
- ISSN
- 1050-2947
- DOI
- https://doi.org/10.1103/PhysRevA.88.020301
- Publikationsdatum
- 08-2013
- Peer-reviewed
- Ja
- ÖFOS 2012
- 103036 Theoretische Physik, 103034 Teilchenphysik
- Schlagwörter
- Link zum Portal
- https://ucrisportal.univie.ac.at/de/publications/83a7e600-e666-4407-83ca-7b8e283265ef