Journal
INTERNATIONAL JOURNAL OF QUANTUM INFORMATION
Volume 9, Issue 7-8, Pages 1685-1699Publisher
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S0219749911008404
Keywords
Quantum many-body; quantum correlations; quantum phase transitions
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Funding
- Department of Employment and Learning
- Magnus Ehrnrooth Foundation
- UK EPSRC [EP/G004759/1]
- Engineering and Physical Sciences Research Council [EP/G004579/1] Funding Source: researchfish
- EPSRC [EP/G004579/1] Funding Source: UKRI
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We study quantum correlations in an isotropic Ising ring under the effects of a transverse magnetic field. After characterizing the behavior of two-spin quantum correlations, we extend our analysis to global properties of the ring, using a figure of merit for quantum correlations that shows enough sensitivity to reveal the drastic changes in the properties of the system at criticality. This opens up the possibility to relate statistical properties of quantum many-body systems to suitably tailored measures of quantum correlations that capture features going far beyond standard quantum entanglement.
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