Transmon公司
物理
量子位元
电路量子电动力学
相位量子位
非谐性
磁通量子比特
微波食品加热
联轴节(管道)
超导量子计算
量子力学
激发态
谐振器
量子电动力学
量子
光电子学
机械工程
工程类
作者
Sina Zeytinoǧlu,Marek Pechal,Simon Berger,A. A. Abdumalikov,Andreas Wallraff,Stefan Filipp
标识
DOI:10.1103/physreva.91.043846
摘要
In the circuit quantum electrodynamics architecture, both the resonance frequency and the coupling of superconducting qubits to microwave field modes can be controlled via external electric and magnetic fields to explore qubit -- photon dynamics in a wide parameter range. Here, we experimentally demonstrate and analyze a scheme for tuning the coupling between a transmon qubit and a microwave resonator using a single coherent drive tone. We treat the transmon as a three-level system with the qubit subspace defined by the ground and the second excited states. If the drive frequency matches the difference between the resonator and the qubit frequency, a Jaynes-Cummings type interaction is induced, which is tunable both in amplitude and phase. We show that coupling strengths of about 10 MHz can be achieved in our setup, limited only by the anharmonicity of the transmon qubit. This scheme has been successfully used to generate microwave photons with controlled temporal shape [Pechal et al., Phys. Rev. X 4, 041010 (2014)] and can be directly implemented with superconducting quantum devices featuring larger anharmonicity for higher coupling strengths.
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