  Quantum discrete-time walkers have, since their introduction, demonstrated
applications in algorithmic and in modeling and simulating a wide range of
transport phenomena. They have long been considered the discrete-time and
discrete space analogue of the Dirac equation and have been used as a primitive
to simulate quantum field theories precisely because of some of their internal
symmetries. In this paper we introduce a new family of quantum walks, said
twisted, which admits, as continuous limit, a generalized Dirac operator
equipped with a dispersion term. Moreover, this quadratic term in the energy
spectrum acts as an effective mass, leading to a regularization of the well
known Fermion doubling problem.
