Hybrid level anharmonicity and interference-induced photon blockade in a two-qubit cavity QED system with dipole–dipole interaction

作     者：C.J.ZHU K.HOU Y.P.YANG L.DENG 

作者机构：MOE Key Laboratory of Advanced Micro-Structured MaterialsSchool of Physics Science and EngineeringTongji UniversityShanghai 200092China School of Physical Science and TechnologySoochow UniversitySuzhou 215006China Collaborative Innovation Center of Light Manipulations and ApplicationsShandong Normal UniversityJinan 250358China Department of Mathematics and PhysicsAnhui Jianzhu UniversityHefei 230601China Center for Optics Research and Engineering(CORE)Shandong UniversityQingdao 266237China 

出 版 物：《Photonics Research》 (光子学研究（英文版）)

年 卷 期：2021年第9卷第7期

页      面：1264-1271页

核心收录：

学科分类：07[理学] 070201[理学-理论物理] 0702[理学-物理学] 

基　　金：National Key Basic Research Special Foundation(2016YFA0302800) National Natural Science Foundation of China (61975154,11874287) Shanghai Science and Technology Committee (18JC1410900) Fundamental Research Funds of Shandong University 

主　　题：function. dipole photon 

摘      要：We theoretically study a quantum destructive interference (QDI)-induced photon blockade in a two-qubit driven cavity quantum electrodynamics system with dipole–dipole interaction (DDI). In the absence of dipole–dipole interaction,we show that a QDI-induced photon blockade can be achieved only when the qubit resonance frequency is different from the cavity mode frequency. When DDI is introduced the condition for this photon blockade is strongly dependent upon the pump field frequency,and yet is insensitive to the qubit–cavity coupling strength. Using this tunability feature we show that the conventional energy-level-anharmonicity-induced photon blockade and this DDI-based QDI-induced photon blockade can be combined together,resulting in a hybrid system with substantially improved mean photon number and second-order correlation function. Our proposal provides a nonconventional and experimentally feasible platform for generating single photons.