Time-domain simulation of a universal quantum gate

摘要

This paper describes the simulation of two coupled particles using the finite-difference time-domain method. We include both unrestricted spin and spatial degrees of freedom for the two particles within the Hartree-Fock approximation. Using spin as a basis, a two-qubit controlled-NOT gate as well as several single qubit gates are simulated in GaAs. We find that the double-occupancy problem can be largely circumvented. (C) 2004 American Institute of Physics.