INSTITUTO DE INVESTIGACIONES FISICAS DE MAR DEL PLATA
Unidad Ejecutora - UE
State determination: An iterative algorithm
GOYENECHE, DARDO MIGUEL; DE LA TORRE, ALBERTO CLEMENTE
PHYSICAL REVIEW A - ATOMIC, MOLECULAR AND OPTICAL PHYSICS
American Physical Society
Año: 2008 vol. 77 p. 1 - 1
An iterative algorithm for state determination, that uses as physical input the probability distributions for the eigenvalues of two or more observables in an unknown state phi is presented. Starting from an arbitrary state psi_0, a succession of states psi_n is obtained that converges to phi or to a Pauli partner. This algorithm for state reconstruction is efficient and robust as is seen in the numerical tests presented and is a useful tool not only for state determination but also for the study of Pauli partners. Its main ingredient is the physical imposition operator that changes any state to have the same physical properties, with respect to an observable, of another state.