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 |
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Article number | 214411 |
Number of pages | 7 |
Journal | Physical Review B (Condensed Matter) |
Volume | 91 |
Issue number | 21 |
DOIs | |
Publication status | Published - 08 Jun 2015 |
Keywords
- quant-ph
- cond-mat.str-el
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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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