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Título

Circuit quantum electrodynamics in the ultrastrong-coupling regime

AutorGarcía-Ripoll, Juan José ; Zueco, David; Solano, Enrique
Fecha de publicación2010
EditorNature Publishing Group
CitaciónNature Physics 6: 772-776 (2010)
ResumenIn circuit quantum electrodynamics (QED), where superconducting artificial atoms are coupled to on-chip cavities, the exploration of fundamental quantum physics in the strong-coupling regime has greatly evolved. In this regime, an atom and a cavity can exchange a photon frequently before coherence is lost. Nevertheless, all experiments so far are well described by the renowned Jaynes-Cummings model. Here, we report on the first experimental realization of a circuit QED system operating in the ultrastrong-coupling limit, where the atom-cavity coupling rate g reaches a considerable fraction of the cavity transition frequency ‰r. Furthermore, we present direct evidence for the breakdown of the Jaynes-Cummings model. We reach remarkable normalized coupling rates g/ ‰r of up to 12% by enhancing the inductive coupling of a flux qubit to a transmission line resonator. Our circuit extends the toolbox of quantum optics on a chip towards exciting explorations of ultrastrong light-matter interaction. © 2010 Macmillan Publishers Limited. All rights reserved.
DescripciónEl pdf del artículo es la versión pre-print: arxiv:1003.2376.-- et al.
Versión del editorhttp://dx.doi.org/10.1038/nphys1730
URIhttp://hdl.handle.net/10261/52504
DOI10.1038/nphys1730
Identificadoresdoi: 10.1038/nphys1730
issn: 1745-2473
e-issn: 1745-2481
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