Gauge-independent emission spectra and quantum correlations in the ultrastrong coupling regime of open system cavity-QED

Salmon, W. ; Gustin, C. ; Settineri, A. ; Di Stefano, O. ; Zueco, D. ; Savasta, S. ; Nori, F. ; Hughes, S.

Resumen: 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.

Idioma: Inglés

DOI: 10.1515/nanoph-2021-0718

Año: 2022

Publicado en: Nanophotonics 11, 8 (2022), 1573-1590
ISSN: 2192-8606

Factor impacto JCR: 7.5 (2022)

Categ. JCR: MATERIALS SCIENCE, MULTIDISCIPLINARY rank: 73 / 343 = 0.213 (2022) - Q1 - T1
Categ. JCR: OPTICS rank: 12 / 99 = 0.121 (2022) - Q1 - T1
Categ. JCR: PHYSICS, APPLIED rank: 23 / 160 = 0.144 (2022) - Q1 - T1
Categ. JCR: NANOSCIENCE & NANOTECHNOLOGY rank: 33 / 107 = 0.308 (2022) - Q2 - T1

Factor impacto CITESCORE: 11.3 - Engineering (Q1) - Biochemistry, Genetics and Molecular Biology (Q1) - Physics and Astronomy (Q1) - Materials Science (Q1)

Factor impacto SCIMAGO: 2.013 - Atomic and Molecular Physics, and Optics (Q1) - Electronic, Optical and Magnetic Materials (Q1) - Electrical and Electronic Engineering (Q1) - Biotechnology (Q1)

Tipo y forma: Article (Published version)