Photon polarization entanglement from distant dipole sources
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Publication:4653622
DOI10.1088/0305-4470/38/1/L02zbMATH Open1065.81512arXivquant-ph/0308095OpenAlexW1964809153WikidataQ61154543 ScholiaQ61154543MaRDI QIDQ4653622
Author name not available (Why is that?)
Publication date: 7 March 2005
Published in: (Search for Journal in Brave)
Abstract: It is commonly believed that photon polarisation entanglement can only be obtained via pair creation within the same source or via postselective measurements on photons that overlapped within their coherence time inside a linear optics setup. In contrast to this, we show here that polarisation entanglement can also be produced by distant single photon sources in free space and without the photons ever having to meet, if the detection of a photon does not reveal its origin -- the which way information. In the case of two sources, the entanglement arises under the condition of two emissions in certain spatial directions and leaves the dipoles in a maximally entangled state.
Full work available at URL: https://arxiv.org/abs/quant-ph/0308095
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