Nonclassicality of spin structures in condensed matter: an analysis of Sr14Cu24O41

Wen Yu Kon , Tanjung Krisnanda , Pinaki Sengupta , Tomasz Paterek


When two quantum systems are coupled via a mediator, their dynamics has traces of nonclassical properties of the mediator. We show how this observation can be effectively utilized to study the quantum nature of materials without well-established structure. A concrete example considered is Sr14Cu24O41. Measurements of low-temperature magnetic and thermal properties of this compound were explained with long-range coupling of unpaired spins through dimerized spin chains. We first show that the required coupling is not provided by the spin chain alone and give alternative compact two-dimensional spin arrangements compatible with the experimental results. Then we argue that any mediator between the unpaired spins must share with them quantum correlations in the form of quantum discord and, in many cases, quantum entanglement. In conclusion, present data witness quantum mediators between unpaired spins in Sr14Cu24O41.
Author Wen Yu Kon
Wen Yu Kon,,
, Tanjung Krisnanda
Tanjung Krisnanda,,
, Pinaki Sengupta
Pinaki Sengupta,,
, Tomasz Paterek (FMPI/ITPA)
Tomasz Paterek,,
- Institute of Theoretical Physics and Astrophysics
Journal seriesPhysical Review B, ISSN 2469-9950, e-ISSN 2469-9969, [1538-4489, 1098-0121], (N/A 140 pkt)
Issue year2019
Publication size in sheets0.50
Article number235103
ASJC Classification2504 Electronic, Optical and Magnetic Materials; 3104 Condensed Matter Physics
Languageen angielski
Score (nominal)140
Score sourcejournalList
ScoreMinisterial score = 140.0, 10-06-2020, ArticleFromJournal
Publication indicators WoS Citations = 0.000; Scopus SNIP (Source Normalised Impact per Paper): 2017 = 1.040; WoS Impact Factor: 2018 = 3.736 (2) - 2018=3.739 (5)
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