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- W4366999914 abstract "It is known that the quantum nature of the electromagnetic vacuum is responsible for the Lamb shift, which is a crucial phenomenon in quantum electrodynamics (QED). In circuit QED, the readout or bus resonators that are dispersively coupled can result in a significant Lamb shift, much larger than that in the original broadband cases. However, previous approaches or proposals for controlling the Lamb shift in circuit QED demand overheads in circuit designs or non-perturbative renormalization of the system's eigenbases, which can impose formidable limitations.In this work, we propose and demonstrate an efficient and cost-effective method for controlling the Lamb shift of fixed-frequency transmons. We employ the drive-induced longitudinal coupling between the transmon and resonator. By simply using an off-resonant monochromatic driving near the resonator frequency, we can regulate the Lamb shift from 32 to -30 MHz without facing the aforementioned challenges. Our work establishes an efficient way of engineering the fundamental effects of the electromagnetic vacuum and provides greater flexibility in non-parametric frequency controls of multilevel systems." @default.
- W4366999914 created "2023-04-27" @default.
- W4366999914 creator A5042843637 @default.
- W4366999914 creator A5042941655 @default.
- W4366999914 date "2023-04-23" @default.
- W4366999914 modified "2023-10-14" @default.
- W4366999914 title "All-microwave and low-cost Lamb shift engineering for a fixed frequency multi-level superconducting qubit" @default.
- W4366999914 doi "https://doi.org/10.48550/arxiv.2304.11782" @default.
- W4366999914 hasPublicationYear "2023" @default.
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