Quantum information - Source of triggered entangled photon pairs? Reply

被引：1
|
作者：
Stevenson, R. Mark
Young, Robert J.
Atkinson, Paola
Cooper, Ken
Ritchie, David A.
Shields, Andrew J.
机构：
[1] Toshiba Res Europe, Cambridge CB4 0WE, England
[2] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England
来源：
NATURE | 2007年 / 445卷 / 7124期
关键词：
D O I：
10.1038/nature05547
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 have reported triggered photon-pair emission from single quantum dots that is suggestive of polarization entanglement. Gilchrist et al. criticize our analysis of the density matrix, claiming that the entanglement test is inappropriate. However, we show here that this analysis is in fact valid for an unpolarized source such as ours, and that this analysis (as well as alternative measures of entanglement) suggests that quantum-dot sources do emit entangled photons, and that their quality is rapidly improving. © 2007 Nature Publishing Group.
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页码：E5 / E6
页数：2
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