Distinct antiblockade features of strongly interacting Rydberg atoms under a two-color weak excitation scheme. (14th January 2020)

• Record Type: Journal Article
• Authors: Bai, Suying; Tian, Xuedong; Han, Xiaoxuan; Jiao, Yuechun; Wu, Jinhui; Zhao, Jianming; Jia, Suotang
• Is Part Of: New journal of physics. Volume 22:Number 1(2020:Jan.)
• Publication Date: 2020-01-14
• Subjects: antiblockade -- dynamic evolution -- multilevel two-body model; Physics -- Periodicals; Physics; Periodicals; 530.05
• DOI: 10.1088/1367-2630/ab6575
• Languages: English
• ISSNs: 1367-2630

Abstract

Abstract: We present distinct antiblockade features of strongly interacting 64 D 5/2 Rydberg atoms employing a two-color excitation scheme. The first color (pulse A) is set to resonantly excite a few seed Rydberg atoms, each of which establishes a blockade region due to the long-range multipole interactions. The second color (pulse B) is blue detuned so that the multipole-interaction-induced shifts of certain atoms are well compensated to result in the antiblockade effect. We find in particular that a few seed atoms can lead to a remarkable difference of the Rydberg excitation in the presence of pulse B for a wide range of blue detuning. Relevant dynamics of this antiblockade excitation is also investigated by varying the pulse-B duration for a fixed blue detuning, further confirming the facilitation process of Rydberg excitation accompanied by a saturation effect. These experimental results can be well recovered by theoretical simulations based on a multilevel two-body model.