Nonclassicality of spin structures in condensed matter: An analysis of Sr 14 Cu 24 O 41

摘要: When two quantum systems are coupled via a mediator, their dynamics has traces of nonclassical properties the mediator. We show how this observation can be effectively utilized to study nature materials without well-established structure. A concrete example considered is ${\mathrm{Sr}}_{14}{\mathrm{Cu}}_{24}{\mathrm{O}}_{41}$. Measurements low-temperature magnetic and thermal compound were explained with long-range coupling unpaired spins through dimerized spin chains. first that required not provided by chain alone give alternative compact two-dimensional arrangements compatible experimental results. Then we argue any mediator between must share them correlations in form discord and, many cases, entanglement. In conclusion, present data witness mediators