title: Electromagnetically induced transparency and fluorescence in blockaded Rydberg atomic system.
abstract: We investigate the interaction between dark states and Rydberg excitation blockade by using electromagnetically induced transparency (EIT), fluorescence, and four-wave mixing (FWM) signals both theoretically and experimentally. By scanning the frequency detunings of the probe and dressing fields, respectively, we first observe these signals (three coexisting EIT windows, two fluorescence signals, and two FWM signals) under Rydberg excitation blockade. Next, frequency detuning dependences of these signals are obtained, in which the modulated results are well explained by introducing the dressing effects (leading to the dark states) with the corrected factor of the Rydberg excitation blockade. In addition, the variations by changing the principal quantum number n of Rydberg state shown some interesting phenomena resulting from Rydberg blockade are observed. The unique nature of such blockaded signals can have potential application in the demonstration of quantum computing.
authors.affiliation: Key Laboratory for Physical Electronics and Devices of the Ministry of Education and Shaanxi Key Lab of Information Photonic Technique, Xi'an Jiaotong University, Xi'an 710049, China.
authors.forename: Cheng
authors.initials: C
authors.lastname: Li
authors.forename: Huaibin
authors.initials: H
authors.lastname: Zheng
authors.forename: Zhaoyang
authors.initials: Z
authors.lastname: Zhang
authors.forename: Xin
authors.initials: X
authors.lastname: Yao
authors.forename: Yunzhe
authors.initials: Y
authors.lastname: Zhang
authors.forename: Yiqi
authors.initials: Y
authors.lastname: Zhang
authors.forename: Yanpeng
authors.initials: Y
authors.lastname: Zhang