无自由费米子无挫折模型的霍尔电导为零
Free Fermion frustration-free models have zero Hall conductance
AI总结:
本研究通过解析方法结合体边对应关系,证明平移不变的自由费米子无挫折模型霍尔电导为零,还给出了半平面上无隙的有隙无挫折模型实例。
摘要:
我们给出了一个新证明,即平移不变的自由费米子无挫折模型具有零霍尔电导。该证明本质上是解析的,利用了体边对应关系。核心论点(适用于平移不变之外的情形)是,在无挫折模型中,边模无法并入基态带。我们给出了一个有隙无挫折模型的例子,该模型在半平面上却无隙。
英文摘要:
We give a new proof that translation-invariant free Fermion frustration-free models have zero Hall conductance. Our proof is analytic in nature and it uses the bulk-edge correspondence. The central argument, which holds beyond the translation-invariant situation, is that in frustration-free models, edge modes cannot merge into the ground state band. We give an example of a gapped frustration-free model that is nonetheless gapless on the half-plane.
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。