Work

Multicolor Continuous‐Variable Quantum Entanglement in the Kerr Frequency Comb

Year: 2023

Type: article

Abstract: In a traveling wave microresonator, the cascaded four‐wave mixing (FWM) between optical modes allows the generation of frequency combs, including intriguing dissipative Kerr solitons (DKS). This study explores the quantum fluctuations of frequency combs and reveal the continuous‐variable quantum entanglement between different comb lines of the DKS states. The entanglement of DKS exhibits two distinct characteristics. For modes located at the spectral edge with a small number of excitations, different comb modes with multiple colors become entangled due to photon‐pair generation and coherent photon conversion stimulated by the FWM. Notably, a sudden disappearance of quantum entanglement in the center of the DKS spectrum is observed, which is attributed to the self‐locking phenomena in the FWM network. These findings demonstrate the prominent quantum nature of DKS, which is of fundamental significance in quantum optics and has the potential to be utilized in quantum networking and distributed quantum sensing applications.

Source: Advanced Quantum Technologies

DOI: 10.1002/qute.202300158

Authors: Ming Li, Yan‐Lei Zhang, Xin‐Biao Xu, Chun‐Hua Dong, Guang‐Can Guo, Chang‐Ling Zou

Institutions: University of Science and Technology of China, CAS Key Laboratory of Quantum Information, USTC

Language: English

Topic: Advanced Fiber Laser Technologies

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: National Natural Science Foundation of China, University of Science and Technology of China, Fundamental Research Funds for the Central Universities