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Attosecond Control of Restoration of Electronic Structure Symmetry

MPG-Autoren
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Sommer,  Christian
Genes Research Group, Research Groups, Max Planck Institute for the Science of Light, Max Planck Society;

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Zitation

Liu, C. M., Manz, J., Ohmori, K., Sommer, C., Takei, N., Tremblay, J. C., et al. (2018). Attosecond Control of Restoration of Electronic Structure Symmetry. Phys. Rev. Lett., 121(17): 173201. doi:10.1103/PhysRevLett.121.173201.


Zitierlink: https://hdl.handle.net/21.11116/0000-0002-ED20-F
Zusammenfassung
Laser pulses can break the electronic structure symmetry of atoms and molecules by preparing a superposition of states with different irreducible representations. Here, we discover the reverse process, symmetry restoration, by means of two circularly polarized laser pulses. The laser pulse for symmetry restoration is designed as a copy of the pulse for symmetry breaking. Symmetry restoration is achieved if the time delay is chosen such that the superposed states have the same phases at the temporal center. This condition must be satisfied with a precision of a few attoseconds. Numerical simulations are presented for the C6H6 molecule and Rb-87 atom. The experimental feasibility of symmetry restoration is demonstrated by means of high-contrast time-dependent Ramsey interferometry of the Rb-87 atom.