Quantum optimal control of isotope-selective rovibrational transitions

We study the quantum control of isotope-selective rovibrational transitions for a binary mixture of diatomic alkali halides, 7Li37Cl and 7Li35Cl. Optimal control theory (OCT) calculations are carried out using the Hamiltonian including both the one-photon and two-photon field-molecule interaction terms. Time-dependent wave packet propagation is performed with both the radial and angular motions being treated quantum mechanically. The targeted processes are exciting one isotoplologue, 7Li37Cl, rotationally and vibrationally-rotationally, while suppressing any excitation of the other, 7Li35Cl. Total time of the control pulse is set to 2000000 atomic unit (48.4 ps). In each control excitation process weak and strong (two-photon absorption and Raman) optimal fields are obtained and total of six processes are investigated. It is found as a result of OCT calculations that every single process can be highly controlled with an appropriate control field.