The low-temperature quasi-universal behavior of amorphous solids has been attributed to the existence of spatially-localized tunneling defects found in the low-energy regions of the potential energy landscape. Computational models of glasses can be studied to elucidate the microscopic nature of these defects. Recent simulation work has demonstrated the means of generating stable glassy configurations for models that mimic metallic glasses using the swap Monte Carlo algorithm. Building on these studies, we present an extensive exploration of the glassy metabasins of the potential energy landscape of a variant of the most widely used model of metallic glasses. We carefully identify tunneling defects and reveal their depletion with increased glass stability. The density of tunneling defects near the experimental glass transition temperature appears to be in good agreement with experimental measurements.

中文翻译：

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金属玻璃模型中两能级系统的显微观察

无定形固体的低温准普遍行为归因于在势能景观的低能区域中发现的空间局部隧道缺陷的存在。可以研究玻璃的计算模型来阐明这些缺陷的微观性质。最近的模拟工作已经证明了使用交换蒙特卡罗算法为模拟金属玻璃的模型生成稳定玻璃配置的方法。在这些研究的基础上，我们对最广泛使用的金属玻璃模型的变体的势能景观的玻璃状元盆地进行了广泛的探索。我们仔细识别隧道缺陷并揭示它们随着玻璃稳定性的增加而耗尽。