New prepring on the intensity correlations in ultra-strongly coupled systems

Spectrum of light emitted from a quantum system can tell us a lot about its dynamics, but to gain insight into its classical, or nonclassical nature, we need to measure other properties of the emission, like its intensity correlations.

In our new preprint Identifying unbound strong bunching and the breakdown of the Rotating Wave Approximation in the quantum Rabi model, in a work led by Alvaro Nodar from the Theory of Nanophotonics group in San Sebastian, we used the intensity correlations of light emitted from a quantum emitter-cavity system, to learn something about the breakdown of the Jaynes-Cummings model. Among other things, we learned that the intensity correlations are an extremely sensitive probe of this breakdown!