Physical Review Letters· 2026Q1
Dressed-state spectroscopy of proton spins in water beyond the rotating-wave approximation
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- Q1SCImago
- 2026year
Short summary
Researchers experimentally observed dressed states of proton spins in water using a strong off-resonant magnetic dressing field, confirming predictions of the quantum Rabi model.
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Key points
- First experimental observation of dressed states of proton spins in water.
- Utilized a strong off-resonant magnetic dressing field in a Rabi-type setup.
- Measured resonance spectrum shows higher-order resonances with multiple dressing-field quanta.
- Observed dressed-state energies agree well with theoretical predictions from the quantum Rabi model.
AI-generated from the title and abstract; the full text is not read.
Abstract
The quantum Rabi model provides the framework for describing a two-level system interacting with a strong oscillating field beyond the rotating-wave approximation. We report the first experimental observation of the resulting dressed states of proton spins in water, realized using a Rabi-type setup with a strong off-resonant magnetic dressing field. The measured resonance spectrum exhibits multiple spin-state transitions involving several dressing-field quanta, including higher-order resonances predicted by the quantum Rabi model. The dressed-state energies show excellent agreement with theoretical expectations, extending dressed-state spectroscopy to proton spins and opening new possibilities for precision spin manipulation in nuclear magnetic resonance and related precision measurements.
The authors' abstract, as published at the source. Physical Review Letters, 2026 · DOI ↗
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Field: Spectroscopy
SpectroscopyChemistry