Strong dispersive coupling between a mechanical resonator and a fluxonium superconducting qubit
| Autor: | Lee, Nathan R. A., Guo, Yudan, Cleland, Agnetta Y., Wollack, E. Alex, Gruenke, Rachel G., Makihara, Takuma, Wang, Zhaoyou, Rajabzadeh, Taha, Jiang, Wentao, Mayor, Felix M., Arrangoiz-Arriola, Patricio, Sarabalis, Christopher J., Safavi-Naeini, Amir H. |
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| Rok vydání: | 2023 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | We demonstrate strong dispersive coupling between a fluxonium superconducting qubit and a 690 megahertz mechanical oscillator, extending the reach of circuit quantum acousto-dynamics (cQAD) experiments into a new range of frequencies. We have engineered a qubit-phonon coupling rate of $g\approx2\pi\times14~\text{MHz}$, and achieved a dispersive interaction that exceeds the decoherence rates of both systems while the qubit and mechanics are highly nonresonant ($\Delta/g\gtrsim10$). Leveraging this strong coupling, we perform phonon number-resolved measurements of the mechanical resonator and investigate its dissipation and dephasing properties. Our results demonstrate the potential for fluxonium-based hybrid quantum systems, and a path for developing new quantum sensing and information processing schemes with phonons at frequencies below 700 MHz to significantly expand the toolbox of cQAD. Comment: 22 pages, 12 figures |
| Databáze: | arXiv |
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