Defining the Semiclassical Limit of the Quantum Rabi Hamiltonian
| Autor: | Andrew Armour, Elinor Kathryn Irish |
|---|---|
| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Physical review letters. 129(18) |
| ISSN: | 1079-7114 |
| Popis: | The crossover from quantum to semiclassical behavior in the seminal Rabi model of light-matter interaction still, surprisingly, lacks a complete and rigorous understanding. A formalism for deriving the semiclassical model directly from the quantum Hamiltonian is developed here. Working in a displaced Fock-state basis $\lvert \alpha, n \rangle$, the semiclassical limit is obtained by taking $\lvert \alpha \rvert \to \infty$ and the coupling to zero. This resolves the discrepancy between coherent-state dynamics and semiclassical Rabi oscillations in both standard and ultrastrong coupling/driving regimes. Furthermore, it provides a framework for studying the quantum-to-classical transition, with potential applications in quantum technologies. Comment: 7 pages, 1 figure; 7 pages Supplemental Material; v2: typos corrected, revised for clarity, additional section added to Supplemental Material |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|