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Spectral collapse in anisotropic two-photon Rabi model.
1Institute of Theoretical Physics and Department of Physics, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong. edcflo@gmail.com.
This study explores spectral collapse in the anisotropic two-photon Rabi model. Light-matter interaction and spin-flipping compete, with light-matter interaction dominating at critical couplings to induce spectral collapse.
Area of Science:
- Quantum Optics
- Atomic Physics
- Condensed Matter Theory
Background:
- The anisotropic two-photon Rabi model describes light-matter interactions.
- Spectral collapse is a phenomenon where energy levels become continuous.
Purpose of the Study:
- Investigate spectral collapse in the anisotropic two-photon Rabi model.
- Analyze the competing effects of light-matter interaction and spin-flipping.
Main Methods:
- Variational study using a squeezed-state trial wave function.
- Analysis of competing impacts on the radiation mode frequency.
Main Results:
- Light-matter interaction and spin-flipping act as competing forces on the radiation mode.
- Light-matter interaction dominance leads to spectral collapse beyond critical couplings.
- Incomplete spectral collapse occurs at critical couplings, resulting in discrete and continuous energy spectra.
Conclusions:
- The number of discrete bound states is determined by the atomic energy level difference.
- Each eigenenergy exhibits twofold degeneracy due to spin.
- The study provides insights into the complex dynamics of light-matter interactions and spectral phenomena.
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