The nuclear AC-Stark shift in super-intense laser fields

Abstract

The direct interaction of super-intense laser fields in the optical frequency domain with nuclei is studied. As main observable, we consider the nuclear AC-Stark shift of low-lying nuclear states due to the off-resonant excitation by the laser field. We include the case of accelerated nuclei to be able to control the frequency and the intensity of the laser field in the nuclear rest frame over a wide range of parameters. We find that AC-Stark shifts of the same order as in typical quantum optical systems relative to the respective transition frequencies are feasible with state-of-the-art or near-future laser field intensities and moderate acceleration of the target nuclei. Along with this shift, we find laser-induced modifications to the proton root-mean-square radii and to the proton density distribution. We thus expect direct laser-nucleus interaction to become of relevance together with other super-intense light-matter interaction processes such as pair creation.

10 pages, 2 eps figures

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• Nonlinear optical effects in a nucleus
• Probing few-excitation eigenstates of interacting atoms on a lattice by observing their collective light emission in the far field
• High-fidelity Nuclear Coherent Population Transfer via the Mixed-State Inverse Engineering
• Highly efficient nuclear population transfer through physics-informed neural networks