Reconciling quantum and classical spectral theories of ultrastrong coupling: Role of cavity bath coupling and gauge corrections
arXiv:2309.15788 · doi:10.1364/OPTICAQ.519395
Abstract
Focusing on the widely adopted Hopfield model with cavity dissipation, we show how the linear spectrum of an ultrastrongly coupled cavity and a dipole can be described either classically or quantum mechanically, but only when the quantum model includes (i) corrections to maintain gauge invariance, and (ii) a specific type of cavity bath coupling. We also show the impact of this bath model on the quantum Rabi model, which has no classical analogue in ultrastrong coupling.
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- Quantum Phase Transitions in Many-Dipole Light-Matter Systems
- What is the spectral density of the reservoir for a lossy quantized cavity?
- Quantum open system description of a hybrid plasmonic cavity
- Direct space-time modeling of mechanically dressed dipole-dipole interactions with electromagnetically-coupled oscillating dipoles