文章基本信息

标题：Quantum controlled-phase-flip gate between a flying optical photon and a Rydberg atomic ensemble
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作者：Y. M. Hao ; G. W. Lin ; Keyu Xia 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2015
卷号：5
期号：1
DOI：10.1038/srep10005
语种：English
出版社：Springer Nature
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 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.