2025/02/09 by Ming‐Hsiu Hsieh, Hsieh, Ming-Hsiu, Roel Tempelaar +1 · 2 voices · 4 citations
Physics and Astronomy · #Quantum Mechanics and Applications
paper · doi:10.1063/5.0266594
openalex created_date 2025/02/12 · openalex publication_date 2025/06/11 · openalex updated_date 2026/07/28
We apply a mixed quantum-classical (MQC) approach to the quantum Rabi model, involving a classical optical field coupled self-consistently to a quantum two-level system. Under the rotating wave approximation, we analytically show that this approach yields persistent yet anharmonic Rabi oscillations, governed by an undamped and unforced Duffing equation. We consider the single-quantum limit, where we find that such anharmonic Rabi oscillations closely follow full-quantum results once zero-point energy is approximately enforced when initializing the optical field coordinate. Our findings provide guidance in the application of MQC dynamics to classes of problems involving small quantum numbers and far away from decoherence.