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

[11] Coherent control of macroscopic quantum states in a single-Cooper-pair box [J].

Nakamura, Y ;

Pashkin, YA ;

Tsai, JS .

NATURE, 1999, 398 (6730) :786-788

[12] Microwave spectroscopy of a quantum-dot molecule [J].

Oosterkamp, TH ;

Fujisawa, T ;

van der Wiel, WG ;

Ishibashi, K ;

Hijman, RV ;

Tarucha, S ;

Kouwenhoven, LP .

NATURE, 1998, 395 (6705) :873-876

[13] Quantum oscillations in two coupled charge qubits [J].

Pashkin, YA ;

Yamamoto, T ;

Astafiev, O ;

Nakamura, Y ;

Averin, DV ;

Tsai, JS .

NATURE, 2003, 421 (6925) :823-826

[14] Time-dependent resonant tunneling via two discrete states [J].

Stoof, TH ;

Nazarov, YV .

PHYSICAL REVIEW B, 1996, 53 (03) :1050-1053

[15] Shell filling and spin effects in a few electron quantum dot [J].

Tarucha, S ;

Austing, DG ;

Honda, T ;

vanderHage, RJ ;

Kouwenhoven, LP .

PHYSICAL REVIEW LETTERS, 1996, 77 (17) :3613-3616

[16] Electron transport through double quantum dots [J].

van der Wiel, WG ;

De Franceschi, S ;

Elzerman, JM ;

Fujisawa, T ;

Tarucha, S ;

Kouwenhoven, LP .

REVIEWS OF MODERN PHYSICS, 2003, 75 (01) :1-22

← 1 2 →