Generalized π pulses
- 1 March 1994
- journal article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 49 (3), 1950-1960
- https://doi.org/10.1103/physreva.49.1950
Abstract
We show that the concept of π pulses can be extended to multilevel systems. Generalized π pulses selectively excite a target state via a mechanism that is closely related to the familiar excitation dynamics in a two-level system. The corresponding generalized area theorem does not refer to the ‘‘area under the pulse envelope,’’ but to an integral over a difference of instantaneous quasienergies. Nevertheless, there are the same possibilities of pulse shaping for the generalized pulses as for their two-level counterparts. A semiclassical interpretation of the resonance condition leads to an analytical approximation to the relevant quasienergies, and shows that the excitation mechanism is universal.Keywords
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