# Thermal emission in the ultrastrong-coupling regime

@article{Ridolfo2012ThermalEI, title={Thermal emission in the ultrastrong-coupling regime}, author={Alessandro Ridolfo and Martin Leib and Salvatore Savasta and Michael J. Hartmann}, journal={Physica Scripta}, year={2012}, volume={T153} }

We have studied the thermal emission of a cavity quantum electrodynamic system in the ultrastrong-coupling regime, where the atom–cavity coupling rate becomes comparable with the cavity resonance frequency. In this regime, the standard descriptions of photodetection and dissipation fail. By following an approach that was recently put forward by Ridolfo et al (2012 Phys. Rev. Lett. 109 193602), we were able to calculate the emission of systems with arbitrary strength of light–matter interaction…

## 4 Citations

### Photon correlations from ultrastrong optical nonlinearities

- Physics
- 2013

We study the full field and frequency filtered output photon statistics of a resonator in thermal equilibrium with a bath and containing an arbitrarily large quartic nonlinearity. According to the…

### Thermodynamics of ultrastrongly coupled light-matter systems

- PhysicsQuantum
- 2020

From this analysis, the lowest-order cavity-induced corrections to those quantities in the collective ultrastrong coupling regime are identified and it is shown that for even stronger interactions the presence of a single cavity mode can strongly modify extensive thermodynamic quantities of a large ensemble of dipoles.

### Broken selection rule in the quantum Rabi model

- PhysicsScientific reports
- 2016

This work shows that sign-changing transitions are an unambiguous, distinctive signature of systems operating in the ultrastrong coupling regime of the quantum Rabi model, paving the way to further studies of sign-preserving selection rules in multiqubit and multiphoton models.

### Corrigendum: Broken selection rule in the quantum Rabi model

- PhysicsScientific reports
- 2016

Scientific Reports 6: Article number: 26720; published online: 07 June 2016; updated: 19 October 2016

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