Nonclassicality and criticality in symmetry protected magnetic phases

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

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)
327 Downloads (Pure)


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 languageEnglish
Article number214411
Number of pages7
JournalPhysical Review B (Condensed Matter)
Issue number21
Publication statusPublished - 08 Jun 2015


  • quant-ph
  • cond-mat.str-el


Dive into the research topics of 'Nonclassicality and criticality in symmetry protected magnetic phases'. Together they form a unique fingerprint.

Cite this