High-Fidelity Bidirectional Nuclear Qubit Initialization in SiC

被引：16

作者：

Ivady, Viktor ^{[1
,2
]}

Klimov, Paul V. ^{[3
]}

Miao, Kevin C. ^{[3
]}

Falk, Abram L. ^{[3
,4
]}

Christle, David J. ^{[3
]}

Szasz, Krisztian ^{[2
]}

Abrikosov, Igor A. ^{[1
,5
]}

Awschalom, David D. ^{[3
]}

Gali, Adam ^{[2
,6
]}

机构：

[1] Linkoping Univ, Dept Phys Chem & Biol, SE-58183 Linkoping, Sweden

[2] Hungarian Acad Sci, Wigner Res Ctr Phys, POB 49, H-1525 Budapest, Hungary

[3] Univ Chicago, Inst Mol Engn, Chicago, IL 60637 USA

[4] IBM TJ Watson Res Ctr, Yorktown Hts, NY 10598 USA

[5] Natl Univ Sci & Technol MISIS, Mat Modeling & Dev Lab, Moscow 119049, Russia

[6] Budapest Univ Technol & Econ, Dept Atom Phys, Budafoki Ut 8, H-1111 Budapest, Hungary

来源：

PHYSICAL REVIEW LETTERS | 2016年 / 117卷 / 22期

基金：

瑞典研究理事会;

关键词：

SPIN QUBITS; COHERENT CONTROL; SILICON-CARBIDE; CENTERS; STATE;

D O I：

10.1103/PhysRevLett.117.220503

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Dynamic nuclear polarization (DNP) is an attractive method for initializing nuclear spins that are strongly coupled to optically active electron spins because it functions at room temperature and does not require strong magnetic fields. In this Letter, we theoretically demonstrate that DNP, with near-unity polarization efficiency, can be generally realized in weakly coupled electron spin-nuclear spin systems. Furthermore, we theoretically and experimentally show that the nuclear spin polarization can be reversed by magnetic field variations as small as 0.8 Gauss. This mechanism offers new avenues for DNP-based sensors and radio-frequency free control of nuclear qubits.

引用

页数：6

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