Journal
PHYSICS LETTERS A
Volume 382, Issue 39, Pages 2799-2804Publisher
ELSEVIER
DOI: 10.1016/j.physleta.2018.08.003
Keywords
Disordered systems; Spin chains; Entanglement; Nonlocality
Categories
Funding
- CAPES
- CNPq
- FAPESP
- INCT-IQ
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We investigate the entanglement and nonlocality properties of two random XX spin-1/2 critical chains, in order to better understand the role of breaking translational invariance to achieve nonlocal states in critical systems. We show that breaking translational invariance is a necessary but not sufficient condition for nonlocality, as the random chains remain in a local ground state up to a small degree of randomness. Furthermore, we demonstrate that the random dimer model does not have the same nonlocality properties of the translationally invariant chain, even though they share the same universality class for a certain range of randomness. (C) 2018 Elsevier B.V. All rights reserved.
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