  We propose a new formulation of the Wigner transport equation with infinite
correlation length. Since the maximum correlation length is not limited to a
finite value, there is no uncertainty in the simulation results owing to the
finite integral range of the nonlocal potential term. For general and efficient
simulation, the WTE is solved self-consistently with the Poisson equation
through the finite volume method and the fully coupled Newton-Raphson scheme.
Through this, we implemented a quantum transport steady state and transient
simulator with excellent convergence.
