Quantum computing with defects

被引：641

作者：

Weber, J. R. ^{[1
]}

Koehl, W. F. ^{[1
]}

Varley, J. B. ^{[1
]}

Janotti, A. ^{[1
]}

Buckley, B. B. ^{[1
]}

Van de Walle, C. G. ^{[1
]}

Awschalom, D. D. ^{[1
]}

机构：

[1] Univ Calif Santa Barbara, Ctr Spintron & Quantum Computat, Santa Barbara, CA 93106 USA

来源：

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA | 2010年 / 107卷 / 19期

基金：

美国国家科学基金会;

关键词：

semiconductor defects; spintronics; first-principles calculations; COHERENT MANIPULATION; SPIN POLARIZATION; SINGLE SPINS;

D O I：

10.1073/pnas.1003052107

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Identifying and designing physical systems for use as qubits, the basic units of quantum information, are critical steps in the development of a quantum computer. Among the possibilities in the solid state, a defect in diamond known as the nitrogen-vacancy (NV-1) center stands out for its robustness-its quantum state can be initialized, manipulated, and measured with high fidelity at room temperature. Here we describe how to systematically identify other deep center defects with similar quantum-mechanical properties. We present a list of physical criteria that these centers and their hosts should meet and explain how these requirements can be used in conjunction with electronic structure theory to intelligently sort through candidate defect systems. To illustrate these points in detail, we compare electronic structure calculations of the NV-1 center in diamond with those of several deep centers in 4H silicon carbide (SiC). We then discuss the proposed criteria for similar defects in other tetrahedrally coordinated semiconductors.

引用

页码：8513 / 8518

页数：6

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