G. Lima, F. A. Torres-Ruiz, L. Neves, A. Delgado, C. Saavedra and S. Pádua
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS 41 (2008)
In this paper we study the state determination for composite systems of two spatial qubits. We show, theoretically, that one can use the technique of quantum tomography to reconstruct the density matrices of these systems. This tomographic reconstruction is based on the free evolution of the spatial qubits and a post-election process.