Ultrastrong coupling regimes of light-matter interaction
By P. Forn-D'iaz, Lucas Lamata, E. Rico, J. Kono, Enrique Solano. Reviews of Modern Physics, 2018
811 citations recorded by the source corpus.
Recent experiments have demonstrated that light and matter can mix together to an extreme degree, and previously uncharted regimes of light-matter interactions are currently being explored in a variety of settings. The so-called ultrastrong coupling (USC) regime is established when the light-matter interaction energy is a comparable fraction of the bare frequencies of the uncoupled systems. Furthermore, when the interaction strengths become larger than the bare frequencies, the deep-strong coupling (DSC) regime emerges. This article reviews advances in the field of the USC and DSC regimes, in particular, for light modes confined in cavities interacting with two-level systems. An overview is first provided on the theoretical progress since the origins from the semiclassical Rabi model until recent developments of the quantum Rabi model. Next, several key experimental results from a variety of quantum platforms are described, including superconducting circuits, semiconductor quantum wells, and other hybrid quantum systems. Finally, anticipated applications are highlighted utilizing USC and DSC regimes, including novel quantum optical phenomena, quantum simulation, and quantum computation.
Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics
View Paper: https://www.semanticscholar.org/paper/b7d1419f1fa57ed5ae05ad2e938b541a86da5de8
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Citations in the corpus
- Breakdown of gauge invariance in ultrastrong-coupling cavity QED (2018, background): “This model predicts a superradiant phase transition (SRT) [12, 13], when the collective atom-field coupling reaches the ultrastrong coupling (USC) regime [14, 15] and becomes comparable to the optical and atomic frequencies.”
- Coherent Conversion Between Microwave and Optical Photons—An Overview of Physical Implementations (2019, neutral): “If this is not the case, then the system is in the ultrastrong coupling or deep strong coupling regimes [56, 57].”