Matryoshka approach to sine-cosine topological models
Matryoshka approach to sine-cosine topological models
We address a particular set of extended Su-Schrieffer-Heeger models with $2n$ sites in the unit cell $[\mathrm{SSH}(2n)]$, that we designate by sine-cosine models $[\mathrm{SC}(n)]$, with hopping terms defined as a sequence of $n$ sine-cosine pairs of the form ${sin({\ensuremath{\theta}}_{j}),cos({\ensuremath{\theta}}_{j})}$, $j=1,\ensuremath{\cdots},n$. These models, when squared, generate a block-diagonal matrix representation with …