Erlangen 2018 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 23: Strong laser fields - I (joint session A/MO)

A 23.4: Vortrag

Dienstag, 6. März 2018, 15:00–15:15, K 2.019

Deterministic control with sequences of intense pulses — •Stefano M. Cavaletto, Zoltan Harman, Thomas Pfeifer, and Christoph H. Keitel — Max Planck Institute for Nuclear Physics, Heidelberg, Germany

Coherent-control methods and pulse-shaping technology have revolutionized our access to the quantum properties of matter. However, with widely used measurement-driven techniques, such as adaptive feedback control, the complex reaction pathways followed by an optimally controlled system often remain concealed. With intense time-dependent pulses dressing the atomic level structure, only a limited number of effective pulse-shaping strategies have been identified. Here, we put forward a deterministic scheme to fully reconstruct the action of an intense pulse on a quantum system from absorption-spectroscopy measurements, including the dependence upon possibly unknown pulse properties and atomic structures [S. M. Cavaletto et al., Phys. Rev. A 95, 043413 (2017)]. An optimal pulse sequence based on this extracted information can then be designed, facilitating manipulation and interpretation of the chosen control strategy. The scheme may be implemented also at x-ray energies with intense pulses from free-electron lasers, representing an effective route to x-ray quantum control.