Coherent control of a triangular exchange-only spin qubit

被引：1

作者：

Acuna, Edwin ^{[1
]}

Broz, Joseph D. ^{[1
]}

Shyamsundar, Kaushal ^{[1
,4
]}

Mei, Antonio B. ^{[1
,5
]}

Feeney, Colin P. ^{[1
]}

Smetanka, Valerie ^{[1
,6
]}

Davis, Tiffany ^{[1
]}

Lee, Kangmu ^{[1
]}

Choi, Maxwell D. ^{[1
]}

Boyd, Brydon ^{[1
]}

Suh, June ^{[1
]}

Ha, Wonill ^{[1
]}

Jennings, Cameron ^{[1
]}

Pan, Andrew S. ^{[1
]}

Sanchez, Daniel S. ^{[1
]}

Reed, Matthew D. ^{[1
]}

Petta, Jason R. ^{[1
,2
,3
]}

机构：

[1] HRL Labs LLC, 3011 Malibu Canyon Rd, Malibu, CA 90265 USA

[2] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA

[3] Univ Calif Los Angeles, Ctr Quantum Sci & Engn, Los Angeles, CA 90095 USA

[4] Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA

[5] Microsoft, One Microsoft Way, Redmond, WA 98052 USA

[6] SCAD Savannah, 342 Bull St, Savannah, GA 31401 USA

来源：

PHYSICAL REVIEW APPLIED | 2024年 / 22卷 / 04期

关键词：

QUANTUM COMPUTATION;

D O I：

10.1103/PhysRevApplied.22.044057

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We demonstrate coherent control of a three-electron exchange-only spin qubit with the quantum dots arranged in a close-packed triangular geometry. The device is tuned to confine one electron in each quantum dot, as evidenced by pairwise charge stability diagrams. Time-domain control of the exchange coupling is demonstrated and qubit performance is characterized using blind randomized benchmarking, with an average single-qubit gate fidelity F = 99.84%. The compact triangular device geometry can be readily scaled to larger two-dimensional quantum dot arrays with high connectivity.

引用

页数：6

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