Readout of a single electron spin based quantum bit by current detection

被引：25

作者：

Ciorga, M ^{[1
]}

Sachrajda, AS

Hawrylak, P

Gould, C

Zawadzki, P

Feng, Y

Wasilewski, Z

机构：

[1] Natl Res Council Canada, Inst Microstruct Sci, Ottawa, ON K1A 0R6, Canada

[2] Univ Sherbrooke, Dept Phys, Sherbrooke, PQ J1K 2R1, Canada

[3] Univ Sherbrooke, CRPS, Sherbrooke, PQ J1K 2R1, Canada

来源：

PHYSICA E | 2001年 / 11卷 / 01期

关键词：

lateral quantum dots; spin polarized injection; current readout;

D O I：

10.1016/S1386-9477(01)00153-9

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We present experimental and theoretical results demonstrating the readout of a single spin based quantum bit by current detection. The quantum bit has been built by isolating a single electron spin in a lateral dot with a tunable number of electrons. The spin state of the dot was read from the current amplitude resulting from the injection of spin polarized electrons. The current amplitude showed a systematic dependence on the spin state of the dot controlled by the number of electrons. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：35 / 40

页数：6

共 27 条

[1] Electrons in artificial atoms [J].

Ashoori, RC .

NATURE, 1996, 379 (6564) :413-419

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

Awschalom, DD ;

Kikkawa, JM .

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

[3] QUANTUM INFORMATION AND COMPUTATION [J].

BENNETT, CH .

PHYSICS TODAY, 1995, 48 (10) :24-30

[4] Coupled quantum dots as quantum exclusive-OR gate [J].

Brum, JA ;

Hawrylak, P .

SUPERLATTICES AND MICROSTRUCTURES, 1997, 22 (03) :431-436

[5]

BUCKARD G, CONDMAT0004182

[6] Addition spectrum of a lateral dot from Coulomb and spin-blockade spectroscopy [J].

Ciorga, M ;

Sachrajda, AS ;

Hawrylak, P ;

Gould, C ;

Zawadzki, P ;

Jullian, S ;

Feng, Y ;

Wasilewski, Z .

PHYSICAL REVIEW B, 2000, 61 (24) :16315-16318

[7] QUANTUM COMPUTATION [J].

DIVINCENZO, DP .

SCIENCE, 1995, 270 (5234) :255-261

[8] QUANTUM-MECHANICAL COMPUTERS [J].

FEYNMAN, RP .

FOUNDATIONS OF PHYSICS, 1986, 16 (06) :507-531

[9] Injection and detection of a spin-polarized current in a light-emitting diode [J].

Fiederling, R ;

Keim, M ;

Reuscher, G ;

Ossau, W ;

Schmidt, G ;

Waag, A ;

Molenkamp, LW .

NATURE, 1999, 402 (6763) :787-790

[10] Spin-valve effects in a semiconductor field-effect transistor: A spintronic device [J].

Gardelis, S ;

Smith, CG ;

Barnes, CHW ;

Linfield, EH ;

Ritchie, DA .

PHYSICAL REVIEW B, 1999, 60 (11) :7764-7767

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