Coherent Control and Spectroscopy of a Semiconductor Quantum Dot Wigner Molecule

被引：30

作者：

Corrigan, J. ^{[1
]}

Dodson, J. P. ^{[1
]}

Ercan, H. Ekmel ^{[1
]}

Abadillo-Uriel, J. C. ^{[1
]}

Thorgrimsson, Brandur ^{[1
]}

Knapp, T. J. ^{[1
]}

Holman, Nathan ^{[1
]}

McJunkin, Thomas ^{[1
]}

Neyens, Samuel F. ^{[1
]}

MacQuarrie, E. R. ^{[1
]}

Foote, Ryan H. ^{[1
]}

Edge, L. F. ^{[2
]}

Friesen, Mark ^{[1
]}

Coppersmith, S. N. ^{[1
,3
]}

Eriksson, M. A. ^{[1
]}

机构：

[1] Univ Wisconsin, Madison, WI 53706 USA

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

[3] Univ New South Wales, Sydney, NSW 2052, Australia

来源：

PHYSICAL REVIEW LETTERS | 2021年 / 127卷 / 12期

基金：

美国国家科学基金会;

关键词：

SILICON; ELECTRONS; STATES; HOT;

D O I：

10.1103/PhysRevLett.127.127701

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Semiconductor quantum dots containing more than one electron have found wide application in qubits, where they enable readout and enhance polarizability. However, coherent control in such dots has typically been restricted to only the lowest two levels, and such control in the strongly interacting regime has not been realized. Here we report quantum control of eight different transitions in a silicon-based quantum dot. We use qubit readout to perform spectroscopy, revealing a dense set of energy levels with characteristic spacing far smaller than the single-particle energy. By comparing with full configuration interaction calculations, we argue that the dense set of levels arises from Wigner-molecule physics.

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页数：6

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