Optically controlled logic gates for two spin qubits in vertically coupled quantum dots

被引：33

作者：

Emary, C. ^{[1
]}

Sham, L. J. ^{[1
]}

机构：

[1] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA

来源：

PHYSICAL REVIEW B | 2007年 / 75卷 / 12期

关键词：

D O I：

10.1103/PhysRevB.75.125317

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We describe an interaction mechanism between electron spins in a vertically stacked double quantum dot that can be used for controlled two-qubit operations. This interaction is mediated by excitons confined within, and delocalized over, the double dot. We show that gates equivalent to the root SWAP gate can be obtained in times much less than the exciton relaxation time and that the negative effects of hole mixing and spontaneous emission do not seriously affect these results.

引用

页数：11

共 20 条

[1]

[Anonymous], UNPUB

[2] 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

[3] Spin-based all-optical quantum computation with quantum dots: Understanding and suppressing decoherence [J].

Calarco, T ;

Datta, A ;

Fedichev, P ;

Pazy, E ;

Zoller, P .

PHYSICAL REVIEW A, 2003, 68 (01) :21

[4] Theory of quantum optical control of a single spin in a quantum dot [J].

Chen, PC ;

Piermarocchi, C ;

Sham, LJ ;

Gammon, D ;

Steel, DG .

PHYSICAL REVIEW B, 2004, 69 (07)

[5] Optically driven spin memory in n-doped InAs-GaAs quantum dots -: art. no. 207401 [J].

Cortez, S ;

Krebs, O ;

Laurent, S ;

Senes, M ;

Marie, X ;

Voisin, P ;

Ferreira, R ;

Bastard, G ;

Gérard, JM ;

Amand, T .

PHYSICAL REVIEW LETTERS, 2002, 89 (20)

[6] Optically controlled single-qubit rotations in self-assembled InAs quantum dots [J].

Emary, C. ;

Sham, L. J. .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2007, 19 (05)

[7] Fast initialization of the spin state of an electron in a quantum dot in the voigt configuration [J].

Emary, C. ;

Xu, Xiaodong ;

Steel, D. G. ;

Saikin, S. ;

Sham, L. J. .

PHYSICAL REVIEW LETTERS, 2007, 98 (04)

[8] Spin-based quantum gating with semiconductor quantum dots by bichromatic radiation method [J].

Feng, M ;

D'Amico, I ;

Zanardi, P ;

Rossi, F .

EUROPHYSICS LETTERS, 2004, 66 (01) :14-20

[9] Quantum computation with quantum dots [J].

Loss, D ;

DiVincenzo, DP .

PHYSICAL REVIEW A, 1998, 57 (01) :120-126

[10] Quantum computing with spin qubits interacting through delocalized excitons: Overcoming hole mixing [J].

Lovett, BW ;

Nazir, A ;

Pazy, E ;

Barrett, SD ;

Spiller, TP ;

Briggs, GAD .

PHYSICAL REVIEW B, 2005, 72 (11)

← 1 2 →