超越平均场的超固体理论
Theory of Supersolids beyond Mean-Field
摘要：
通过求解硬核玻色子${}^4$ He晶格的各向异性海森堡模型，研究了新发现的超固相。我们包括最近和次最近邻相互作用，并精确计算所有的对关联函数的累积展开计划。我们描述了正常的固体和超固体相的性质，并认为基于类比的费米子半填充扩展哈伯德模型的超固体状态对应于键序波。
英文摘要：
We investigate the newly discovered supersolid phase by solving in random phase approximation the anisotropic Heisenberg model of the hard-core boson ${}^4$He lattice. We include nearest and next-nearest neighbor interactions and calculate exactly all pair correlation functions in a cumulant expansion scheme. We describe the properties of the normal solid and supersolid phases and argue that based on analogies to the fermionic half filled extended Hubbard model the supersolid state corresponds to a bond-ordered-wave.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
