Properties of collective Rabi oscillations with two Rydberg atoms

作     者：Dan-Dan Ma Ke-Ye Zhang Jing Qian 马丹丹;张可烨;钱静

作者机构：Quantum Institute for Light and AtomsSchool of Physics and Material ScienceEast China Normal University 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2019年第28卷第1期

页      面：340-347页

核心收录：

学科分类：07[理学] 070203[理学-原子与分子物理] 0702[理学-物理学] 

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.11474094,11104076,and 11574086) the Science and Technology Commission of Shanghai Municipality,China(Grant Nos.18ZR1412800 and 16QA1401600) the Specialized Research Fund for the Doctoral Program of Higher Education,China(Grant No.20110076120004) 

主　　题：Rydberg atoms collective excitation Rabi oscillation excitation blockade 

摘      要：Motivated by experimental advances that the collective excitation of two Rydberg atoms was observed, we provide an elaborate theoretical study for the dynamical behavior of two-atom Rabi oscillations. In the large-intermediate-detuning case, the two-photon Rabi oscillation is found to be significantly affected by the strength of the interatomic van der Waals interaction. With a careful comparison of the exact numbers and values of the oscillation frequency, we propose a new way to determine the strength of excitation blockade, agreeing well with the previous universal criterion for full, partial, and no blockade regions. In the small-intermediate-detuning case, we find a blockade-like effect, but the collective enhancement factor is smaller than ^(1/2) due to the quantum interference of double optical transitions involving the intermediate ***, a fast two-photon Rabi oscillation in ns timescale is manifested by employing intense lasers with an intensity of ~MW/cm^2, offering a possibility of ultrafast control of quantum dynamics with Rydberg atoms.