Electric field control and optical signature of entanglement in quantum dot molecules

被引：27

作者：

Bester, G ^{[1
]}

Zunger, A ^{[1
]}

机构：

[1] Natl Renewable Energy Lab, Golden, CO 80401 USA

来源：

PHYSICAL REVIEW B | 2005年 / 72卷 / 16期

关键词：

D O I：

10.1103/PhysRevB.72.165334

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The degree of entanglement of an electron with a hole in a vertically coupled self-assembled dot molecule is shown to be tunable by an external electric field. Using atomistic pseudopotential calculations followed by a configuration interaction many-body treatment of correlations, we calculate the electronic states, degree of entanglement, and optical absorption. We offer a way to spectroscopically detect the magnitude of electric field needed to maximize the entanglement.

引用

收藏

页数：7

相关论文

共 25 条

[1] Stark-shift modulation absorption spectroscopy of single quantum dots [J].

Alén, B ;

Bickel, F ;

Karrai, K ;

Warburton, RJ ;

Petroff, PM .

APPLIED PHYSICS LETTERS, 2003, 83 (11) :2235-2237

[2] Entangled exciton states in quantum dot molecules [J].

Bayer, M ;

Ortner, G ;

Larionov, A ;

Timofeev, V ;

Forchel, A ;

Hawrylak, P ;

Hinzer, K ;

Korkusinski, M ;

Fafard, S ;

Wasilewski, Z .

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, 2002, 12 (1-4) :900-903

[3] Coupling and entangling of quantum states in quantum dot molecules [J].

Bayer, M ;

Hawrylak, P ;

Hinzer, K ;

Fafard, S ;

Korkusinski, M ;

Wasilewski, ZR ;

Stern, O ;

Forchel, A .

SCIENCE, 2001, 291 (5503) :451-453

[4] Concentrating partial entanglement by local operations [J].

Bennett, CH ;

Bernstein, HJ ;

Popescu, S ;

Schumacher, B .

PHYSICAL REVIEW A, 1996, 53 (04) :2046-2052

[5] Broken symmetry and quantum entanglement of an exciton in InxGa1-xAs/GaAs quantum dot molecules -: art. no. 075325 [J].

Bester, G ;

Zunger, A ;

Shumway, J .

PHYSICAL REVIEW B, 2005, 71 (07)

[6] Theory of excitonic spectra and entanglement engineering in dot molecules [J].

Bester, G ;

Shumway, J ;

Zunger, A .

PHYSICAL REVIEW LETTERS, 2004, 93 (04) :047401-1

[7] Pseudopotential calculation of the excitonic fine structure of million-atom self-assembled In1-xGaxAs/GaAs quantum dots -: art. no. 161306 [J].

Bester, G ;

Nair, S ;

Zunger, A .

PHYSICAL REVIEW B, 2003, 67 (16)

[8]

CRAIG DP, 1968, EXCITONS MOL CRYSTAL

[9] QUANTUM COMPUTATION [J].

DIVINCENZO, DP .

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

[10] LOCALIZED ATOMIC AND MOLECULAR ORBITALS [J].

EDMISTON, C ;

RUEDENBERG, K .

REVIEWS OF MODERN PHYSICS, 1963, 35 (03) :457-&