Lattice fermion simulation of spontaneous time-reversal symmetry breaking in a helical Luttinger liquid

V. A. Zakharov, J. Sánchez Fernán, C. W. J. Beenakker

We extend a recently developed "tangent fermion" method to discretize the Hamiltonian of a helical Luttinger liquid on a one-dimensional lattice, including two-particle backscatter…