Author Affiliations
Abstract
1 Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, Key Laboratory for Matter Microstructure and Function of Hunan Province, Department of Physics and Synergetic Innovation Center for Quantum Effects and Applications, Hunan Normal University, Changsha 410081, China
2 Department of Applied Physics, East China Jiaotong University, Nanchang 330013, China
3 Key Laboratory of Opto-electronic Technology, Ministry of Education, Beijing University of Technology, Beijing 100124, China
4 Center for Emergent Matter Science (CEMS), RIKEN, Wako, Saitama 351-0198, Japan
5 Department of Physics, Zhejiang Sci-Tech University, Hangzhou 310018, China
6 Institute of Microelectronics, Tsinghua University, Beijing 100084, China
7 Frontier Science Center for Quantum Information, Beijing 100084, China
8 e-mail: aixichen@zstu.edu.cn
Stimulated emission and absorption are two fundamental processes of light–matter interaction, and the coefficients of the two processes should be equal. However, we will describe a generic method to realize the significant difference between the stimulated emission and absorption coefficients of two nondegenerate energy levels, which we refer to as a nonreciprocal transition. As a simple implementation, a cyclic three-level atom system, comprising two nondegenerate energy levels and one auxiliary energy level, is employed to show a nonreciprocal transition via a combination of synthetic magnetism and reservoir engineering. Moreover, a single-photon nonreciprocal transporter is proposed using two one-dimensional semi-infinite coupled-resonator waveguides connected by an atom with nonreciprocal transition effect. Our work opens up a route to design atom-mediated nonreciprocal devices in a wide range of physical systems.
Photonics Research
2021, 9(5): 05000879
Author Affiliations
Abstract
1 Department of Applied Physics, East China Jiaotong University, Nanchang 330013, China
2 Faculty of Information Technology, College of Microelectronics, Beijing University of Technology, Beijing 100124, China
3 Center for Emergent Matter Science (CEMS), RIKEN, Wako, Saitama 351-0198, Japan
4 Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, Department of Physics and Synergetic Innovation Center for Quantum Effects and Applications, Hunan Normal University, Changsha 410081, China
5 Department of Physics, Zhejiang Sci-Tech University, Hangzhou 310018, China
6 e-mail: jinghui73@foxmail.com
7 e-mail: aixichen@zstu.edu.cn
We propose to achieve nonreciprocal quantum control of photons in a quadratic optomechanical (QOM) system based on directional nonlinear interactions. We show that by optically pumping the QOM system in one side, the effective QOM coupling can be enhanced significantly in that side, but not for the other side. This, contrary to the intuitive picture, allows the emergence of a nonreciprocal photon blockade in such optomechanical devices with weak single-photon QOM coupling. Our proposal opens up the prospect of exploring and utilizing quantum nonreciprocal optomechanics, with applications ranging from single-photon nonreciprocal devices to on-chip chiral quantum engineering.
Photonics Research
2020, 8(2): 02000143
Author Affiliations
Abstract
1 Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, Department of Physics and Synergetic Innovation Center for Quantum Effects and Applications, Hunan Normal University, Changsha 410081, China
2 Department of Applied Physics, East China Jiaotong University, Nanchang 330013, China
3 Theoretical Quantum Physics Laboratory, RIKEN Cluster for Pioneering Research, Wako-shi, Saitama 351-0198, Japan
4 Faculty of Physics, Adam Mickiewicz University, 61-614 Poznan, Poland
5 e-mail: miran@amu.edu.pl
6 e-mail: jinghui73@gmail.com
We propose how to achieve quantum nonreciprocity via unconventional photon blockade (UPB) in a compound device consisting of an optical harmonic resonator and a spinning optomechanical resonator. We show that, even with very weak single-photon nonlinearity, nonreciprocal UPB can emerge in this system, i.e., strong photon antibunching can emerge only by driving the device from one side but not from the other side. This nonreciprocity results from the Fizeau drag, leading to different splitting of the resonance frequencies for the optical counter-circulating modes. Such quantum nonreciprocal devices can be particularly useful in achieving back-action-free quantum sensing or chiral photonic communications.
Photonics Research
2019, 7(6): 06000630

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