Atomic, Molecular, and Optical Physics Seminar
Control of Raman Transitions in Rydberg Systems
Department of Physics
Coherent populations of atomic and molecular systems can be controlled using shaped electromagnetic pulses. Much of the understanding of selective excitation is understood through perturbation theory. We have developed an experimental system to explore the nonperturbative control of quantum evolution in few-level systems. In the experiments Raman transitions between fine-structure levels of Rydberg states in alkali atoms are driven by high-fidelity microwave pulses with uniform intensity. We show that small changes in the pulse shape can dramatically change both the qualitative and quantitative behavior of the population transfer. Further, straightforward shaping of spectral phase can enhance the population transfer to selected states beyond what is achievable with transform-limited pulses of equal or smaller energy and an identical spectrum.
Monday, February 28, 2005
Gant Science Complex