Entangled Photon Pairs from Semiconductor Quantum Dots
量子物理
2009-11-11 v2 强关联电子
摘要
Tomographic analysis demonstrates that the polarization state of pairs of photons emitted from a biexciton decay cascade becomes entangled when spectral filtering is applied. The measured density matrix of the photon pair satisfies the Peres criterion for entanglement by more than 3 standard deviations of the experimental uncertainty and violates Bell's inequality. We show that the spectral filtering erases the ``which path'' information contained in the photons color and that the remanent information in the quantum dot degrees of freedom is negligible.
引用
@article{arxiv.quant-ph/0512048,
title = {Entangled Photon Pairs from Semiconductor Quantum Dots},
author = {N. Akopian and N. H. Lindner and E. Poem and Y. Berlatzky and J. Avron and D. Gershoni and B. D. Gerardot and P. M. Petroff},
journal= {arXiv preprint arXiv:quant-ph/0512048},
year = {2009}
}