Lamb shift and the vacuum Rabi splitting in a strongly dissipative environment

• Main Authors: Yan, Yiying, Ergogo, Tadele T., Lü, Zhiguo, Chen, Lipeng, Luo, Jun Yan, Zhao, Yang
• Other Authors: School of Materials Science and Engineering
• Format: Article
• Language: English
• Published: 2022
• Subjects: Science::Chemistry::Physical chemistry; Cavity Mode; Qubits
• Online Access: https://hdl.handle.net/10356/157800
• Institution: Nanyang Technological University

We study the vacuum Rabi splitting of a qubit ultrastrongly coupled to a high-Q cavity mode and a radiation reservoir. Three methods are employed: a numerically exact variational approach with a multiple Davydov ansatz, the rotating-wave approximation (RWA), and the transformed RWA. Agreement betwee...