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Universal Renyi mutual information in classical systems: The case of kagome ice

机译:经典系统中的普遍仁义互信息:kagome冰的情况

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摘要

We study the Renyi mutual information of classical systems characterized by a transfer matrix. We first establish a general relationship between the Renyi mutual information of such classical mixtures of configuration states and the Renyi entropy of a corresponding Rokhsar-Kivelson-type quantum superposition. We then focus on chiral and nonchiral kagome-ice systems, classical spin liquids on the kagome lattice, which respectively have critical and short-range correlations. Through a mapping of the chiral kagome ice to the quantum Liftshitz critical field theory, we predict a universal subleading term in the Renyi mutual information of this classical spin liquid, which can be realized in the pyrochlore spin ice in a magnetic field. We verify our prediction with direct numerical transfer-matrix computations, and further demonstrate that the nonchiral kagome ice (and the corresponding quantum Rokhsar-Kivelson superposition) is a topologically trivial phase. Finally, we argue that the universal term in the mutual information of the chiral kagome ice is fragile against the presence of defects.
机译:我们研究了以传递矩阵为特征的经典系统的人际互信息。我们首先在这种配置态经典混合的Renyi互信息与相应的Rokhsar-Kivelson型量子叠加的Renyi熵之间建立一般关系。然后,我们将重点讨论手性和非手性kagome-ice系统,kagome晶格上的经典自旋液体,它们分别具有临界和短程相关性。通过将手性kagome冰映射到量子Liftshitz临界场理论,我们预测了这种经典自旋液体的Renyi互信息中的一个普遍的次引导项,这可以在磁场中的烧绿石自旋冰中实现。我们用直接的数值传递矩阵计算验证了我们的预测,并进一步证明了非手性kagome冰(以及相应的量子Rokhsar-Kivelson叠加)是拓扑上无关紧要的阶段。最后,我们认为手性kagome冰的相互信息中的通用术语对于缺陷的存在是脆弱的。

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