Global-to-local incompatibility, monogamy of entanglement, and ground-state dimerization

Autor(en)

S. M. Giampaolo, B. C. Hiesmayr, F. Illuminati

Abstrakt

Frustration in quantum many-body systems is quantified by the degree of incompatibility between the local and global orders associated, respectively, with the ground states of the local interaction terms and the global ground state of the total many-body Hamiltonian. This universal measure is bounded from below by the ground-state bipartite block entanglement. For many-body Hamiltonians that are sums of two-body interaction terms, a further inequality relates quantum frustration to the pairwise entanglement between the constituents of the local interaction terms. This additional bound is a consequence of the limits imposed by monogamy on entanglement shareability. We investigate the behavior of local pair frustration in quantum spin models with competing interactions on different length scales and show that valence bond solids associated with exact ground state dimerization correspond to a transition from generic frustration, i.e., geometric, common to classical and quantum systems alike, to genuine quantum frustration, i.e., solely due to the noncommutativity of the different local interaction terms. We discuss how such frustration transitions separating genuinely quantum orders from classical-like ones are detected by observable quantities such as the static structure factor and the interferometric visibility.

Organisation(en)

Teilchenphysik

Externe Organisation(en)

Università degli Studi di Salerno, Consorzio Nazionale Interuniversitario per le Scienze Fisiche della Materia, Istituto Nazionale di Fisica Nucleare (INFN), Roma

Journal

Physical Review B

Band

92

Anzahl der Seiten

11

ISSN

1098-0121

DOI

https://doi.org/10.1103/PhysRevB.92.144406

Publikationsdatum

10-2015

Peer-reviewed

Ja

ÖFOS 2012

103025 Quantenmechanik, 103019 Mathematische Physik

Schlagwörter

ASJC Scopus Sachgebiete

Electronic, Optical and Magnetic Materials, Condensed Matter Physics

Link zum Portal

https://ucris.univie.ac.at/portal/de/publications/globaltolocal-incompatibility-monogamy-of-entanglement-and-groundstate-dimerization(4704e1bb-aa92-470f-9424-ae8c1ade6191).html