Abstract
Nature Photonics 4, 302–306 (2010); published online: 7 March 2010; retracted online: 16 October 2012. In this Letter, we claimed the generation of entangled photons from highly symmetric site-controlled pyramidal quantum dots. Apart from the observation of isotropic emission and the measurement of a vanishing fine-structure splitting of 0 μeV ± 2 μeV, a fidelity of >0.
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