Implementation of Quantum Logic Gates Using Polar Molecules in Pendular   States
  We present a systematic approach to implementation of basic quantum logic gates operating on polar molecules in pendular states as qubits for a quantum computer. A static electric field prevents quenching of the dipole moments by rotation, thereby creating the pendular states; also, the field gradient enables distinguishing among qubit sites. Multi-Target Optimal Control Theory (MTOCT) is used as a means of optimizing the initial-to-target transition probability via a laser field. We give detailed calculations for the SrO molecule, a favorite candidate for proposed quantum computers. Our simulation results indicate that NOT, Hadamard and CNOT gates can be realized with high fidelity for such pendular qubit states. 
Jing Zhu and Sabre Kais and Qi Wei and Dudley Herschbach and Bretislav   Friedrich
quant-ph physics.atom-ph physics.chem-ph