Two-photon probe of the Jaynes-Cummings model and symmetry breaking in circuit QED

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dc.creatorDeppe, Frank
dc.creatorMariantoni, Matteo
dc.creatorMenzel, E. P.
dc.creatorMarx, A.
dc.creatorSaito, S.
dc.creatorKakuyanagi, K.
dc.creatorTanaka, H.
dc.creatorMeno, T.
dc.creatorSemba, K.
dc.creatorTakayanagi, H.
dc.creatorSolano, E.
dc.creatorGross, R.
dc.date2008-05-21
dc.date.accessioned2026-07-07T12:09:39Z
dc.date.available2026-07-07T12:09:39Z
dc.descriptionSuperconducting qubits behave as artificial two-level atoms and are used to investigate fundamental quantum phenomena. In this context, the study of multi-photon excitations occupies a central role. Moreover, coupling superconducting qubits to on-chip microwave resonators has given rise to the field of circuit QED. In contrast to quantum-optical cavity QED, circuit QED offers the tunability inherent to solid-state circuits. In this work, we report on the observation of key signatures of a two-photon driven Jaynes-Cummings model, which unveils the upconversion dynamics of a superconducting flux qubit coupled to an on-chip resonator. Our experiment and theoretical analysis show clear evidence for the coexistence of one- and two-photon driven level anticrossings of the qubit-resonator system. This results from the symmetry breaking of the system Hamiltonian, when parity becomes a not well-defined property. Our study provides deep insight into the interplay of multiphoton processes and symmetries in a qubit-resonator system.
dc.descriptionAccepted for publication in Nature Physics, 8 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/0805.3294
dc.identifierhttp://arxiv.org/abs/0805.3294
dc.identifierNature Physics 4, pp686-691 (2008)
dc.identifierdoi:10.1038/nphys1016
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/209698
dc.subjectSuperconductivity
dc.subjectMesoscale and Nanoscale Physics
dc.subjectQuantum Physics
dc.titleTwo-photon probe of the Jaynes-Cummings model and symmetry breaking in circuit QED
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