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28 March 2024 |
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Two-photon probe of the Jaynes-Cummings model and symmetry breaking in circuit QED | Frank Deppe
; Matteo Mariantoni
; E. P. Menzel
; A. Marx
; S. Saito
; K. Kakuyanagi
; H. Tanaka
; T. Meno
; K. Semba
; H. Takayanagi
; E. Solano
; R. Gross
; | Date: |
21 May 2008 | Abstract: | Superconducting 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. | Source: | arXiv, 0805.3294 | Services: | Forum | Review | PDF | Favorites |
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