Spintronics and quantum computing: switching mechanisms for qubits

被引：18

作者：

Leuenberger, MN ^{[1
]}

Loss, D ^{[1
]}

机构：

[1] Univ Basel, Dept Phys & Astron, CH-4056 Basel, Switzerland

来源：

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2001年 / 10卷 / 1-3期

关键词：

quantum computation; spintronics; switches;

D O I：

10.1016/S1386-9477(01)00136-9

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Quantum computing and quantum communication are remarkable examples of new information processing technologies that arise from the coherent manipulation of spins in nanostructures. We review our theoretical proposal for using electron spins in quantum-confined nanostructures as qubits. We present single- and two-qubit gate mechanisms in laterally as well as vertically coupled quantum dots and discuss the possibility to couple spins in quantum dots via exchange or superexchange. In addition, we propose a new stationary wave switch, which allows to perform quantum operations with quantum dots or spin-(1)/(2) molecules placed on a 1D or 2D lattice. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：452 / 457

页数：6

共 22 条

[1] Quantum dot molecules [J].

Austing, DG ;

Honda, T ;

Muraki, K ;

Tokura, Y ;

Tarucha, S .

PHYSICA B-CONDENSED MATTER, 1998, 249 :206-209

[2] Electron spin and optical coherence in semiconductors [J].

Awschalom, DD ;

Kikkawa, JM .

PHYSICS TODAY, 1999, 52 (06) :33-38

[3] ELEMENTARY GATES FOR QUANTUM COMPUTATION [J].

BARENCO, A ;

BENNETT, CH ;

CLEVE, R ;

DIVINCENZO, DP ;

MARGOLUS, N ;

SHOR, P ;

SLEATOR, T ;

SMOLIN, JA ;

WEINFURTER, H .

PHYSICAL REVIEW A, 1995, 52 (05) :3457-3467

[4] Quantum information and computation [J].

Bennett, CH ;

DiVincenzo, DP .

NATURE, 2000, 404 (6775) :247-255

[5]

Burkard G, 2000, FORTSCHR PHYS, V48, P965, DOI 10.1002/1521-3978(200009)48:9/11<965::AID-PROP965>3.0.CO

[6]

2-V

[7] Spin interactions and switching in vertically tunnel-coupled quantum dots [J].

Burkard, G ;

Seelig, G ;

Loss, D .

PHYSICAL REVIEW B, 2000, 62 (04) :2581-2592

[8] Coupled quantum dots as quantum gates [J].

Burkard, G ;

Loss, D ;

DiVincenzo, DP .

PHYSICAL REVIEW B, 1999, 59 (03) :2070-2078

[9] Spin-dependent Josephson current through double quantum dots and measurement of entangled electron states [J].

Choi, MS ;

Bruder, C ;

Loss, D .

PHYSICAL REVIEW B, 2000, 62 (20) :13569-13572

[10] Quantum computers and quantum coherence [J].

DiVincenzo, DP ;

Loss, D .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1999, 200 (1-3) :202-218

← 1 2 3 →