Abstract
Quantum excitation is usually regarded as a transient process occurring instantaneously,leaving the under-lying 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.
基金项目
国家重点研发计划(2019YFA0307703)
国家自然科学基金(12234020)
国家自然科学基金(11874066)
国家自然科学基金(12274461)
国家自然科学基金(11974426)
Science and Technology Innovation Program of Hunan Province(2022RC1193)
NETL
NSTL
万方数据