Quantum computers based on electron spins controlled by ultrafast off-resonant single optical pulses

被引：82

作者：

Clark, Susan M. ^{[1
]}

Fu, Kai-Mei C.

Ladd, Thaddeus D.

Yamamoto, Yoshihisa

机构：

[1] Stanford Univ, Edward L Ginzton Lab, Stanford, CA 94305 USA

[2] Natl Inst Informat, Chiyoda Ku, Tokyo 1018430, Japan

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 99卷 / 04期

关键词：

D O I：

10.1103/PhysRevLett.99.040501

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We describe a fast quantum computer based on optically controlled electron spins in charged quantum dots that are coupled to microcavities. This scheme uses broadband optical pulses to rotate electron spins and provide the clock signal to the system. Nonlocal two-qubit gates are performed by phase shifts induced by electron spins on laser pulses propagating along a shared waveguide. Numerical simulations of this scheme demonstrate high-fidelity single-qubit and two-qubit gates with operation times comparable to the inverse Zeeman frequency.

引用

页数：4

共 28 条

[1] Fault-tolerant quantum communication based on solid-state photon emitters [J].

Childress, L ;

Taylor, JM ;

Sorensen, AS ;

Lukin, MD .

PHYSICAL REVIEW LETTERS, 2006, 96 (07) :1-4

[2] Quantum state transfer and entanglement distribution among distant nodes in a quantum network [J].

Cirac, JI ;

Zoller, P ;

Kimble, HJ ;

Mabuchi, H .

PHYSICAL REVIEW LETTERS, 1997, 78 (16) :3221-3224

[3] Quantum communication between atomic ensembles using coherent light [J].

Duan, LM ;

Cirac, JI ;

Zoller, P ;

Polzik, ES .

PHYSICAL REVIEW LETTERS, 2000, 85 (26) :5643-5646

[4] Single-pulse coherently controlled nonlinear Raman spectroscopy and microscopy [J].

Dudovich, N ;

Oron, D ;

Silberberg, Y .

NATURE, 2002, 418 (6897) :512-514

[5] Ultrafast optical control of electron spin coherence in charged GaAs quantum dots [J].

Dutt, M. V. Gurudev ;

Cheng, Jun ;

Wu, Yanwen ;

Xu, Xiaodong ;

Steel, D. G. ;

Bracker, A. S. ;

Gammon, D. ;

Economou, Sophia E. ;

Liu, Ren-Bao ;

Sham, L. J. .

PHYSICAL REVIEW B, 2006, 74 (12)

[6] Proposal for optical U(1) rotations of electron spin trapped in a quantum dot [J].

Economou, Sophia E. ;

Sham, L. J. ;

Wu, Yanwen ;

Steel, D. G. .

PHYSICAL REVIEW B, 2006, 74 (20)

[7] Controlling the spontaneous emission rate of single quantum dots in a two-dimensional photonic crystal [J].

Englund, D ;

Fattal, D ;

Waks, E ;

Solomon, G ;

Zhang, B ;

Nakaoka, T ;

Arakawa, Y ;

Yamamoto, Y ;

Vuckovic, J .

PHYSICAL REVIEW LETTERS, 2005, 95 (01)

[8] Coherent population trapping of electron spins in a high-purity n-type GaAs semiconductor -: art. no. 187405 [J].

Fu, KMC ;

Santori, C ;

Stanley, C ;

Holland, MC ;

Yamamoto, Y .

PHYSICAL REVIEW LETTERS, 2005, 95 (18)

[9] Homogeneous linewidths in the optical spectrum of a single gallium arsenide quantum dot [J].

Gammon, D ;

Snow, ES ;

Shanabrook, BV ;

Katzer, DS ;

Park, D .

SCIENCE, 1996, 273 (5271) :87-90

[10] Mode locking of electron spin coherences in singly charged quantum dots [J].

Greilich, A. ;

Yakovlev, D. R. ;

Shabaev, A. ;

Efros, Al. L. ;

Yugova, I. A. ;

Oulton, R. ;

Stavarache, V. ;

Reuter, D. ;

Wieck, A. ;

Bayer, M. .

SCIENCE, 2006, 313 (5785) :341-345

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