Investigating Surface Loss Effects in Superconducting Transmon Qubits

被引：85

作者：

Gambetta, Jay M. ^{[1
]}

Murray, Conal E. ^{[1
]}

Fung, Y. -K. -K. ^{[1
]}

McClure, Douglas T. ^{[1
]}

Dial, Oliver ^{[1
]}

Shanks, William ^{[1
]}

Sleight, Jeffrey W. ^{[1
]}

Steffen, Matthias ^{[1
]}

机构：

[1] IBM TJ Watson Res Ctr, Int Business Machines, Yorktown Hts, NY 10598 USA

来源：

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 2017年 / 27卷 / 01期

关键词：

Dielectric loss; quantum noise; superconducting qubits;

D O I：

10.1109/TASC.2016.2629670

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Superconducting qubits are sensitive to a variety of loss mechanisms including dielectric loss from interfaces. By changing the physical footprint of the qubit, it is possible to modulate sensitivity to surface loss. Here, we show a systematic study of planar superconducting transmons of differing physical footprints to optimize the qubit design for maximum coherence. We find that qubits with small footprints are limited by surface loss and that qubits with large footprints are limited by other loss mechanisms, which are currently not understood.

引用

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