Multi-mode mediated exchange coupling in cavity QED
Autor: | Filipp, S., Göppl, M., Fink, J. M., Baur, M., Bianchetti, R., Steffen, L., Wallraff, A. |
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Rok vydání: | 2010 |
Předmět: | |
Zdroj: | Phys. Rev. A 83, 063827 (2011) |
Druh dokumentu: | Working Paper |
DOI: | 10.1103/PhysRevA.83.063827 |
Popis: | Microwave cavities with high quality factors enable coherent coupling of distant quantum systems. Virtual photons lead to a transverse exchange interaction between qubits, when they are non-resonant with the cavity but resonant with each other. We experimentally probe the inverse scaling of the inter-qubit 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, in the case of resonant qubits, the symmetry properties of the system lead to an allowed two-photon transition to the doubly excited qubit state and the formation of a dark state. Comment: 9 pages, 6 figures |
Databáze: | arXiv |
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