Multimode mediated qubit-qubit coupling and dark-state symmetries in circuit quantum electrodynamics

S. Filipp, M. Göppl, J.M. Fink, M. Baur, R. Bianchetti, L. Steffen, A. Wallraff, Physical Review A - Atomic, Molecular, and Optical Physics 83 (2011).

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Abstract
Microwave cavities with high quality factors enable coherent coupling of distant quantum systems. Virtual photons lead to a transverse interaction between qubits when they are nonresonant with the cavity but resonant with each other. We experimentally investigate the inverse scaling of the interqubit coupling with the detuning from a cavity mode and its proportionality to the qubit-cavity interaction strength. We demonstrate that the enhanced coupling at higher frequencies is mediated by multiple higher-harmonic cavity modes. Moreover, we observe dark states of the coupled qubit-qubit system and analyze their relation to the symmetry of the applied driving field at different frequencies.
Publishing Year
Date Published
2011-06-22
Journal Title
Physical Review A - Atomic, Molecular, and Optical Physics
Acknowledgement
This work was supported by the Swiss National Science Foundation (SNF), the Austrian Science Foundation (FWF), and ETH Zurich
Volume
83
Issue
6
IST-REx-ID

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Filipp S, Göppl M, Fink JM, et al. Multimode mediated qubit-qubit coupling and dark-state symmetries in circuit quantum electrodynamics. Physical Review A - Atomic, Molecular, and Optical Physics. 2011;83(6). doi:10.1103/PhysRevA.83.063827
Filipp, S., Göppl, M., Fink, J. M., Baur, M., Bianchetti, R., Steffen, L., & Wallraff, A. (2011). Multimode mediated qubit-qubit coupling and dark-state symmetries in circuit quantum electrodynamics. Physical Review A - Atomic, Molecular, and Optical Physics, 83(6). https://doi.org/10.1103/PhysRevA.83.063827
Filipp, Stefan, M Göppl, Johannes M Fink, Matthias Baur, R Bianchetti, L. Steffen, and Andreas Wallraff. “Multimode Mediated Qubit-Qubit Coupling and Dark-State Symmetries in Circuit Quantum Electrodynamics.” Physical Review A - Atomic, Molecular, and Optical Physics 83, no. 6 (2011). https://doi.org/10.1103/PhysRevA.83.063827.
S. Filipp et al., “Multimode mediated qubit-qubit coupling and dark-state symmetries in circuit quantum electrodynamics,” Physical Review A - Atomic, Molecular, and Optical Physics, vol. 83, no. 6, 2011.
Filipp S, Göppl M, Fink JM, Baur M, Bianchetti R, Steffen L, Wallraff A. 2011. Multimode mediated qubit-qubit coupling and dark-state symmetries in circuit quantum electrodynamics. Physical Review A - Atomic, Molecular, and Optical Physics. 83(6).
Filipp, Stefan, et al. “Multimode Mediated Qubit-Qubit Coupling and Dark-State Symmetries in Circuit Quantum Electrodynamics.” Physical Review A - Atomic, Molecular, and Optical Physics, vol. 83, no. 6, American Physical Society, 2011, doi:10.1103/PhysRevA.83.063827.

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