文献类型：期刊文献

英文题名：Quantum controlled-phase-flip gate between a flying optical photon and a Rydberg atomic ensemble

作者：Hao, Y. M.[1];Lin, G. W.[1];Xia, Keyu[2];Lin, X. M.[3];Niu, Y. P.[1];Gong, S. Q.[1]

机构：[1]E China Univ Sci & Technol, Dept Phys, Shanghai 200237, Peoples R China;[2]Macquarie Univ, ARC Ctr Engn Quantum Syst, Dept Phys & Astron, Sydney, NSW 2109, Australia;[3]Fujian Normal Univ, Coll Phys & Energy, Fuzhou 350108, Peoples R China

年份：2015

卷号：5

外文期刊名：SCIENTIFIC REPORTS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000354310400001)】；

基金：We thank Jiangbin Gong for helpful discussions. This work was supported by the National Natural Sciences Foundation of China (Grants No. 11204080, No. 11274112, No. 91321101, and No. 61275215), the Fundamental Research Funds for the Central Universities (Grants No. WM1313003).

语种：英文

摘要：Quantum controlled-phase-flip (CPF) gate between a flying photon qubit and a stationary atomic qubit could allow the linking of distant computational nodes in a quantum network. Here we present a scheme to realize quantum CPF gate between a flying optical photon and an atomic ensemble based on cavity input-output process and Rydberg blockade. When a flying single-photon pulse is reflected off the cavity containing a Rydberg atomic ensemble, the dark resonance and Rydberg blockade induce a conditional phase shift pi for the photon pulse, thus we can achieve the CPF gate between the photon and the atomic ensemble. Assisted by Rydberg blockade interaction, our scheme works in the N-atoms strong-coupling regime and significantly relaxes the requirement of strong coupling of single atom to photon in the optical cavity.