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Deep strong coupling regime of the Jaynes-Cummings model
J Casanova1, G Romero, I Lizuain
1Departamento de Química Física, Universidad del País Vasco-Euskal Herriko Unibertsitatea, Bilbao, Spain.
Physical Review Letters
|January 15, 2011
Summary
We explore quantum dynamics in the deep strong coupling regime (DSC) of the Jaynes-Cummings model. Our new physical frame reveals photon wave packet dynamics, causing population collapse and revivals in two-level systems.
Area of Science:
- Quantum optics
- Quantum dynamics
- Atomic physics
Background:
- The Jaynes-Cummings model describes light-matter interaction.
- The deep strong coupling (DSC) regime (g/ω≳1) challenges standard approximations like the rotating-wave approximation.
Purpose of the Study:
- To develop a new physical frame for understanding quantum dynamics in the DSC regime.
- To analyze the behavior of a two-level system coupled to a harmonic oscillator beyond perturbative limits.
Main Methods:
- Developing an intuitive and predictive physical frame.
- Applying numerical and analytical methods.
- Investigating qubit population dynamics, photon statistics, and Wigner phase space.
Main Results:
- Photon number wave packets exhibit oscillatory behavior along parity chains in the Hilbert space.
- The proposed frame accurately describes collapse and revival phenomena in population dynamics.
- Distinct signatures in qubit population, photon statistics, and Wigner phase space are identified.
Conclusions:
- The developed physical frame provides a powerful tool for studying quantum systems in the DSC regime.
- This work offers new insights into fundamental light-matter interactions beyond the rotating-wave approximation.
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