Physical Review Letters
The half-cycle pulse (HCP) was used to search for information stored as phase in a Rydberg wave packet. Phase information coded in a Rydberg quantum register was retrieved through the impulsive interaction of HCP. In general, results of the study point to the use of HCPs as general tools for analysis for unknown wave packet.
Ahn, J.; Hutchinson, D.N.; Rangan, Chitra; and Bucksbaum, P.H.. (2001). Quantum phase retrieval of a Rydberg wave packet using a half-cycle pulse. Physical Review Letters, 86 (7), 1179-1182.