We demonstrate strong suppression of charge dispersion in a semiconductor-based transmon qubit across Josephson resonances associated with a quantum dot in the junction. On resonance, dispersion is drastically reduced compared to conventional transmons with corresponding Josephson and charging energies. We develop a model of qubit dispersion for a single-channel resonance, which is in quantitative agreement with experimental data.
Suppressed Charge Dispersion via Resonant Tunneling in a Single-Channel Transmon / Kringhøj, A; van Heck, B; Larsen, T W; Erlandsson, O; Sabonis, D; Krogstrup, P; Casparis, L; Petersson, K D; Marcus, C M. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 124:24(2020). [10.1103/PhysRevLett.124.246803]
Suppressed Charge Dispersion via Resonant Tunneling in a Single-Channel Transmon
van Heck, BSecondo
;
2020
Abstract
We demonstrate strong suppression of charge dispersion in a semiconductor-based transmon qubit across Josephson resonances associated with a quantum dot in the junction. On resonance, dispersion is drastically reduced compared to conventional transmons with corresponding Josephson and charging energies. We develop a model of qubit dispersion for a single-channel resonance, which is in quantitative agreement with experimental data.| File | Dimensione | Formato | |
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