Suppressed Charge Dispersion via Resonant Tunneling in a Single-Channel Transmon

被引：41
|
作者：
Kringhoj, A. [1 ,2 ]
van Heck, B. [3 ,4 ]
Larsen, T. W. [1 ,2 ]
Erlandsson, O. [1 ,2 ]
Sabonis, D. [1 ,2 ]
Krogstrup, P. [1 ,2 ,5 ]
Casparis, L. [1 ,2 ]
Petersson, K. D. [1 ,2 ]
Marcus, C. M. [1 ,2 ]
机构：
[1] Univ Copenhagen, Microsoft Quantum Lab Copenhagen, Univ Pk 5, DK-2100 Copenhagen, Denmark
[2] Univ Copenhagen, Niels Bohr Inst, Ctr Quantum Devices, Univ Pk 5, DK-2100 Copenhagen, Denmark
[3] Univ Calif Santa Barbara, Microsoft Quantum, Stn Q, Santa Barbara, CA 93106 USA
[4] Delft Univ Technol, Microsoft Quantum Lab Delft, NL-2600 GA Delft, Netherlands
[5] Microsoft Quantum Mat Lab Copenhagen, Kanalvej 7, DK-2800 Lyngby, Denmark
来源：
PHYSICAL REVIEW LETTERS | 2020年 / 124卷 / 24期
基金：
新加坡国家研究基金会;
关键词：
COULOMB-BLOCKADE; JOSEPHSON;
D O I：
10.1103/PhysRevLett.124.246803
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
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.
引用
收藏
页数：6
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