000151691 001__ 151691
000151691 005__ 20251017144632.0
000151691 0247_ $$2doi$$a10.1103/PhysRevResearch.3.023079
000151691 0248_ $$2sideral$$a126270
000151691 037__ $$aART-2021-126270
000151691 041__ $$aeng
000151691 100__ $$aSettineri A.
000151691 245__ $$aGauge freedom, quantum measurements, and time-dependent interactions in cavity QED
000151691 260__ $$c2021
000151691 5060_ $$aAccess copy available to the general public$$fUnrestricted
000151691 5203_ $$aThe interaction between quantized electromagnetic fields in cavities and natural or artificial atoms has played a crucial role in developing our understanding of light-matter interactions and quantum technologies. Recently, new regimes beyond the weak and strong light-matter coupling of cavity-QED have been explored in several settings, wherein the light-matter coupling rate becomes comparable to (ultrastrong coupling) or even exceeds (deep-strong coupling) the photon frequency. These ultrastrong coupling regimes can give rise to new physical effects and applications, and they challenge our understanding of cavity QED; fundamental issues like the proper definition of subsystems, their quantum measurements, the structure of light-matter ground states, and the analysis of time-dependent interactions are subject to gauge ambiguities that lead to even qualitatively distinct predictions. The resolution of these ambiguities is important for understanding and designing next-generation quantum devices that can operate in extreme coupling regimes. Here we discuss and provide solutions to these ambiguities by adopting an approach based on operational procedures involving measurements on the individual light and matter components of the interacting system.
000151691 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttps://creativecommons.org/licenses/by/4.0/deed.es
000151691 594__ $$a4.6$$b2021
000151691 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000151691 700__ $$aDi Stefano O.
000151691 700__ $$0(orcid)0000-0003-4478-1948$$aZueco D.
000151691 700__ $$aHughes S.
000151691 700__ $$aSavasta S.
000151691 700__ $$aNori F.
000151691 773__ $$g3, 2 (2021), [16 pp.]$$pPhys. rev. res.$$tPhysical Review Research$$x2643-1564
000151691 8564_ $$s993184$$uhttps://zaguan.unizar.es/record/151691/files/texto_completo.pdf$$yVersión publicada
000151691 8564_ $$s3113060$$uhttps://zaguan.unizar.es/record/151691/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000151691 909CO $$ooai:zaguan.unizar.es:151691$$particulos$$pdriver
000151691 951__ $$a2025-10-17-14:26:50
000151691 980__ $$aARTICLE