title: Quantum-control spectroscopy with exact state selectivity.
abstract: A method of exact state-selective spectroscopy is introduced, based on quantum control through four specific short laser pulses. The exact conditions for the two pairs of ultrafast pulses are set by the feedback control for selective excitation to one specific resonance state while the other state is destructively interfered as the shadow pair, leading to a state-selective spectrum.
authors.affiliation: Advanced Photon Research Center, Japan Atomic Energy Research Institute, Kizu-cho, Kyoto 619-0215, Japan.
authors.forename: Yoshiaki
authors.initials: Y
authors.lastname: Teranishi