TY - JOUR KW - pfc AU - M. Stowe AU - Avi Pe’er AU - Jun Ye BT - Physical Review Letters DA - 5/2008 DO - 10.1103/PhysRevLett.100.203001 PY - 2008 T2 - Physical Review Letters TI - Control of Four-Level Quantum Coherence via Discrete Spectral Shaping of an Optical Frequency Comb VL - 100 SN - 0031-9007 ER -