117478 20240319081001.0 doi 10.1515/nanoph-2021-0718 sideral 128784 ART-2022-128784 eng Salmon, W. Gauge-independent emission spectra and quantum correlations in the ultrastrong coupling regime of open system cavity-QED 2022 Access copy available to the general public Unrestricted A quantum dipole interacting with an optical cavity is one of the key models in cavity quantum electrodynamics (cavity-QED). To treat this system theoretically, the typical approach is to truncate the dipole to two levels. However, it has been shown that in the ultrastrong-coupling regime, this truncation naively destroys gauge invariance. By truncating in a manner consistent with the gauge principle, we introduce master equations for open systems to compute gauge-invariant emission spectra, photon flux rates, and quantum correlation functions which show significant disagreement with previous results obtained using the standard quantum Rabi model. Explicit examples are shown using both the dipole gauge and the Coulomb gauge. © 2022 Will Salmon et al., published by De Gruyter, Berlin/Boston. info:eu-repo/semantics/openAccess by http://creativecommons.org/licenses/by/3.0/es/ 7.5 2022 MATERIALS SCIENCE, MULTIDISCIPLINARY 73 / 343 = 0.213 2022 Q1 T1 OPTICS 12 / 99 = 0.121 2022 Q1 T1 PHYSICS, APPLIED 23 / 160 = 0.144 2022 Q1 T1 NANOSCIENCE & NANOTECHNOLOGY 33 / 107 = 0.308 2022 Q2 T1 2.013 2022 Atomic and Molecular Physics, and Optics 2022 Q1 Electronic, Optical and Magnetic Materials 2022 Q1 Electrical and Electronic Engineering 2022 Q1 Biotechnology 2022 Q1 11.3 2022 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Gustin, C. Settineri, A. Di Stefano, O. Zueco, D. (orcid)0000-0003-4478-1948 Savasta, S. Nori, F. Hughes, S. 11, 8 (2022), 1573-1590 Nanophotonics Nanophotonics 2192-8606 1497283 http://zaguan.unizar.es/record/117478/files/texto_completo.pdf Versión publicada 2740424 http://zaguan.unizar.es/record/117478/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:117478 articulos driver 2024-03-18-14:10:33 ARTICLE