My question concerns a comment made on this post:
Because one needs two Majorana modes $\gamma_1$ and $\gamma_2$ to each regular fermionic $c^\dagger c$ one, any two associated Majorana modes combine to create a regular fermion.
I understand the math behind this, but I would like a more physical understanding of why two Majorana zero modes make a fermion in a condensed matter system. Any additional reference that talks about these Majorana operators at the level of Fradkin's or Wen's book on field theory in condensed matter would be greatly appreciated.
