deletions | additions       diff --git a/We_start_to_look_into__.tex b/We_start_to_look_into__.tex  index 48c7697..0c7831b 100644  --- a/We_start_to_look_into__.tex  +++ b/We_start_to_look_into__.tex 
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We start to look into detail of the edge states by Su-Schrieffer-Heeger (SSH) model.\cite{2015arXiv150902295A} SSH model describes the spinless fermions hopping on 1D lattice with staggered hopping amplitudes, shown in Fig.4. The Hamiltonian of the SSH system is   \begin{equation}  \textit{H}=v\sum  \end{equation}