Coherent manipulation of electronic states in a double quantum dot

被引：689

作者：

Hayashi, T

Fujisawa, T

Cheong, HD

Jeong, YH

Hirayama, Y

机构：

[1] NTT Corp, NTT Basic Res Labs, Atsugi, Kanagawa 2430198, Japan

[2] Hanbat natl Univ, Taejon, South Korea

[3] Pohang Univ Sci & Technol, Pohang, Kyungpook, South Korea

[4] CREST, Kawaguchi 3310012, Japan

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 91卷 / 22期

关键词：

D O I：

10.1103/PhysRevLett.91.226804

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We investigate coherent time evolution of charge states (pseudospin qubit) in a semiconductor double quantum dot. This fully tunable qubit is manipulated with a high-speed voltage pulse that controls the energy and decoherence of the system. Coherent oscillations of the qubit are observed for several combinations of many-body ground and excited states of the quantum dots. Possible decoherence mechanisms in the present device are also discussed.

引用

页数：4

共 16 条

[1]

[Anonymous], 2009, Quantum computation and quantum information, DOI DOI 10.1119/1.1463744

[2] Current switch by coherent trapping of electrons in quantum dots [J].

Brandes, T ;

Renzoni, F .

PHYSICAL REVIEW LETTERS, 2000, 85 (19) :4148-4151

[3] Adiabatic transfer of electrons in coupled quantum dots [J].

Brandes, T ;

Vorrath, T .

PHYSICAL REVIEW B, 2002, 66 (07) :753411-7534112

[4] Electronic states and transport phenomena in quantum dot systems [J].

Eto, M .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, 2001, 40 (3B) :1929-1935

[5] Spontaneous emission spectrum in double quantum dot devices [J].

Fujisawa, T ;

Oosterkamp, TH ;

van der Wiel, WG ;

Broer, BW ;

Aguado, R ;

Tarucha, S ;

Kouwenhoven, LP .

SCIENCE, 1998, 282 (5390) :932-935

[6] Allowed and forbidden transitions in artificial hydrogen and helium atoms [J].

Fujisawa, T ;

Austing, DG ;

Tokura, Y ;

Hirayama, Y ;

Tarucha, S .

NATURE, 2002, 419 (6904) :278-281

[7]

FUJISAWA T, IN PRESS

[8]

ITAKURA T, 2003, PHYS REV B, V68

[9] DYNAMICS OF THE DISSIPATIVE 2-STATE SYSTEM [J].

LEGGETT, AJ ;

CHAKRAVARTY, S ;

DORSEY, AT ;

FISHER, MPA ;

GARG, A ;

ZWERGER, W .

REVIEWS OF MODERN PHYSICS, 1987, 59 (01) :1-85

[10] Charge echo in a cooper-pair box [J].

Nakamura, Y ;

Pashkin, YA ;

Yamamoto, T ;

Tsai, JS .

PHYSICAL REVIEW LETTERS, 2002, 88 (04) :4

← 1 2 →