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arXiv 1804.04750math-phmath.MPquant-ph
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一维自旋和费米子带隙基态相的稳定性

Stability of Gapped Ground State Phases of Spins and Fermions in One Dimension

Alvin Moon, Bruno Nachtergaele

摘要:

研究了一维无阻挫量子晶格系统在弱扰动和开边界条件下谱隙的持续性。假设系统的相互作用满足局部拓扑量子序的形式,我们证明了明确的基态光谱间隙的下限和更高的自旋和费米子链的间隙。通过适应以前的方法使用的频谱流,我们分析了批量和边缘的依赖性的下限上的频谱间隙。

英文摘要:

We investigate the persistence of spectral gaps of one-dimensional frustration free quantum lattice systems under weak perturbations and with open boundary conditions. Assuming the interactions of the system satisfy a form of local topological quantum order, we prove explicit lower bounds on the ground state spectral gap and higher gaps for spin and fermion chains. By adapting previous methods using the spectral flow, we analyze the bulk and edge dependence of lower bounds on spectral gaps.

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。

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