Coupling and entangling of quantum states in quantum dot molecules

被引：745

作者：

Bayer, M ^{[1
]}

Hawrylak, P

Hinzer, K

Fafard, S

Korkusinski, M

Wasilewski, ZR

Stern, O

Forchel, A

机构：

[1] Univ Wurzburg, Inst Phys, D-97074 Wurzburg, Germany

[2] Natl Res Council Canada, Inst Microstruct Sci, Ottawa, ON K1A 0R6, Canada

[3] Univ Ottawa, Dept Phys, Ottawa, ON K1N 6N5, Canada

来源：

SCIENCE | 2001年 / 291卷 / 5503期

关键词：

D O I：

10.1126/science.291.5503.451

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

We demonstrate coupling and entangling of quantum states in a pair of vertically aligned, self-assembled quantum dots by studying the emission of an interacting electron-hole pair (exciton) in a single dot molecule as a function of the separation between the dots. An interaction-induced energy splitting of the exciton is observed that exceeds 30 millielectron volts for a dot layer separation of 4 nanometers. The results are interpreted by mapping the tunneling of a particle in a double dot to the problem of a single spin. The electron-hole complex is shown to be equivalent to entangled states of two interacting spins.

引用

页码：451 / 453

页数：3

共 33 条

[1] Quantum dot molecules [J].