Explicit generation of unitary transformations in a single atom or molecule
Viswanath Ramakrishna, Raimund J. Ober, Xiaobai Sun, Ole Steuernagel, Jair Botina, HERSCHEL A. RABITZ · Physical Review A · 2000
A constructive procedure for generating a prescribed unitary transform via the optically driven evolution of a multilevel atom is described. Assuming a clean separation of the coupled levels, the procedure employs the rotating wave approximation together with a decomposition of a unitary matrix into simpler matrix factors with specified structure. Applications to state preparation and observation are also provided.