文献类型：期刊文献

英文题名：Reversible nonmagnetic single-photon isolation using unbalanced quantum coupling

作者：Xia, Keyu[1];Lu, Guowei[2];Lin, Gongwei[3];Cheng, Yuqing[2];Niu, Yueping[3];Gong, Shangqing[3];Twamley, Jason[1]

机构：[1]Macquarie Univ, Dept Phys & Astron, ARC Ctr Engn Quantum Syst, N Ryde, NSW 2109, Australia;[2]Peking Univ, Dept Phys, State Key Lab Mesoscop Phys, Beijing 100871, Peoples R China;[3]E China Univ Sci & Technol, Dept Phys, Shanghai 200237, Peoples R China

年份：2014

卷号：90

期号：4

外文期刊名：PHYSICAL REVIEW A

收录：;EI(收录号：20144300120609);WOS:【SCI-EXPANDED(收录号:WOS:000343734100006)】；

基金：This work was funded by the Australian Research Council Centre of Excellence for Engineered Quantum Systems (EQuS), CE110001013, and the National Natural Science Foundation of China (Grants No. 11204080, No. 11274112, and No. 61275215).

语种：英文

外文关键词：Particle beams - Photons - Light - Magnetic fields - Microresonators

摘要：The nonreciprocal propagation of light at the single-photon level is essential for building a quantum network. Bulk optical schemes are lossy and difficulty to integrate onto a chip. We propose a single-photon optical diode and a three-port circulator without a magnetic field by coupling an unbalanced quantum impurity to a passive, linear optical waveguide or a whispering-gallery-mode microresonator which supports a locally or globally circularly polarized photon. Thanks to the unbalanced quantum Jaynes-Cummings coupling, the optical nonreciprocal propagation of single photons can be achieved without an external magnetic field. In particular, the three-port single-photon circulator can be accomplished using the existing experimental technology. The optical isolation can be reversed by selectively populating the initial state of the quantum impurity. Moreover, by using an ensemble of identical atoms filled in a hollow-core microbottle resonator, nonreciprocal propagation of weak light pulses can be achieved.