| ATOMIC AND MOLECULAR PHYSICS |
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Twin-Capture Rydberg State Excitation Enhanced with Few-Cycle Laser Pulses |
| Jing Zhao1, Jinlei Liu1, Xiaowei Wang1, and Zengxiu Zhao1,2* |
1Department of Physics, National University of Defense Technology, Changsha 410073, China
2Hunan Key Laboratory of Extreme Matter and Applications, National University of Defense Technology, Changsha 410073, China
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| Cite this article: |
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Jing Zhao, Jinlei Liu, Xiaowei Wang et al 2024 Chin. Phys. Lett. 41 013201 |
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Abstract Quantum excitation is usually regarded as a transient process occurring instantaneously, leaving the underlying physics shrouded in mystery. Recent research shows that Rydberg-state excitation with ultrashort laser pulses can be investigated and manipulated with state-of-the-art few-cycle pulses. We theoretically find that the efficiency of Rydberg state excitation can be enhanced with a short laser pulse and modulated by varying the laser intensities. We also uncover new facets of the excitation dynamics, including the launching of an electron wave packet through strong-field ionization, the re-entry of the electron into the atomic potential and the crucial step where the electron makes a U-turn, resulting in twin captures into Rydberg orbitals. By tuning the laser intensity, we show that the excitation of the Rydberg state can be coherently controlled on a sub-optical-cycle timescale. Our work paves the way toward ultrafast control and coherent manipulation of Rydberg states, thus benefiting Rydberg-state-based quantum technology.
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Received: 23 October 2023
Editors' Suggestion
Published: 02 January 2024
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| PACS: |
32.80.Rm
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(Multiphoton ionization and excitation to highly excited states)
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42.50.Hz
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(Strong-field excitation of optical transitions in quantum systems; multiphoton processes; dynamic Stark shift)
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42.65.Ky
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(Frequency conversion; harmonic generation, including higher-order harmonic generation)
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