Nonclassicality and criticality in symmetry protected magnetic phases

Matthew J. M. Power; Steve Campbell; Maria Moreno-Cardoner; Gabriele De Chiara

doi:10.1103/PhysRevB.91.214411

Nonclassicality and criticality in symmetry protected magnetic phases

Matthew J. M. Power, Steve Campbell, Maria Moreno-Cardoner, Gabriele De Chiara

School of Mathematics and Physics

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

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Abstract

Quantum and global discord in a spin-1 Heisenberg chain subject to single-ion anisotropy (uniaxial field) are studied using exact diagonalisation and the density matrix renormalisation group (DMRG). We find that these measures of quantum non-classicality are able to detect the quantum phase transitions confining the symmetry protected Haldane phase and show critical scaling with universal exponents. Moreover, in the case of thermal states, we find that quantum discord can increase with increasing temperature.

Original language	English
Article number	214411
Number of pages	7
Journal	Physical Review B (Condensed Matter)
Volume	91
Issue number	21
DOIs	https://doi.org/10.1103/PhysRevB.91.214411
Publication status	Published - 08 Jun 2015

Keywords

quant-ph
cond-mat.str-el

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10.1103/PhysRevB.91.214411

Non-classicality and criticality in symmetry protected magnetic phases
©2015 American Physical Society
Accepted author manuscript, 1.25 MB

Non-classicality and criticality in symmetry protected magnetic phases
De Chiara, G. (Creator), Queen's University Belfast, 2015
DOI: 10.17034/78ba1359-26e2-46d8-a866-3a8b82e40e08
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Nonclassicality and criticality in symmetry protected magnetic phases

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Non-classicality and criticality in symmetry protected magnetic phases

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