2009 Andreas P. Schnyder et al, "The superspin approach to a disordered quantum wire in the chiral-unitary symmetry class with an arbitrary number of channels" arXiv
By treating the space direction along the chains as imaginary time, the effects of the disorder are encoded in the time evolution induced by a single site superspin (non-Hermitian) Hamiltonian.
2010 Hae-Young Kee, "Role of electronic nematicity in the interplay between s- and d-wave broken-symmetry states" arXiv
Our findings imply that nematic order does not affect the competition among the order parameters within the same superspin, while it strongly interferes the interplay between two order parameters that belong to different superspins.
