摘要
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.
作者
赵晶
刘金磊
王小伟
赵增秀
Jing Zhao;Jinlei Liu;Xiaowei Wang;Zengxiu Zhao(Department of Physics,National University of Defense Technology,Changsha 410073,China;Hunan Key Laboratory of Extreme Matter and Applications,National University of Defense Technology,Changsha 410073,China)
基金
supported by the National Key Research and Development Program of China(Grant No.2019YFA0307703)
the National Natural Science Foundation of China(Grant Nos.12234020,11874066,12274461,and 11974426)
the Science and Technology Innovation Program of Hunan Province(Grant No.2022RC1193).
