Affiliation:
1. Key Laboratory for Physical Electronics and Devices of the Ministry of Education School of Science Shaanxi Key Laboratory of Information Photonic Technique Institute of Wide Bandgap Semiconductors Xi'an Jiaotong University Xi'an 710049 China
2. SCNU‐TUE Joint Lab of Device Integrated Responsive Materials (DIRM) National Center for International Research on Green Optoelectronics South China Normal University Guangzhou 510006 China
3. Yangling Vocational & Technical College Xianyang 712100 China
4. Engineering Comprehensive Training Center Xi'an University of Architecture and Technology Xi'an 710049 China
Abstract
AbstractMultipartite quantum entanglement plays a vital role in both fundamental science and quantum applications. The cascaded four‐wave mixing (FWM) process is an effective method to prepare multipartite entanglement, however, the physical nature of entanglement based on different cascading paths, i.e., simultaneous cascaded FWM (SC‐FWM) and ordinal cascaded FWM (OC‐FWM), has not yet been conclusively determined. In this article, tunable continuous‐variable (CV) triple‐mode entanglement is proposed to be generated by using both the SC‐FWM and OC‐FWM schemes. The simulation results reveal that the absorption/dispersion properties of the two nonlinear processes can be efficiently tuned by varying the optical parameters (i.e., the photon detuning and the nonlinear susceptibility), resulting in triple‐mode CV entanglement with tunable properties. Compared with the OC‐FWM scheme, the SC‐FWM scheme has a broader entanglement bandwidth and a higher degree of entanglement, where the tripartite entanglement region is 4.38% larger than that of the OC‐FWM scheme. Furthermore, these results indicate that the SC‐FWM scheme has a more compact and stable mode structure with better entanglement performance. Such tunable optical triple‐mode entanglement may find applications in specific quantum communication protocols and pave the way for implementing and manipulating multichannel quantum networks.
Funder
National Key Research and Development Program of China
Key Technologies Research and Development Program
Natural Science Foundation of Shaanxi Province
National Natural Science Foundation of China
Natural Science Basic Research Program of Shaanxi Province