TY - JOUR AU - T Yoon AU - A Marian AU - John Hall AU - Jun Ye C2 - Physical Review A (Atomic, Molecular and Optical Physics) DA - 2001-01-01 00:01:00 LA - en M1 - 63 PB - Physical Review A (Atomic, Molecular and Optical Physics) PY - 2001 TI - Phase-coherent multilevel two-photon transitions in cold Rb atoms: Ultrahigh-resolution spectroscopy via frequency-stabilized femtosecond laser ER -