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arXiv · 2004.02691

Improved Heralded Schemes to Generate Entangled States From Single Photons

F. V. Gubarev·I. V. Dyakonov·M. Yu. Saygin·G. I. Struchalin·S. S. Straupe·S. P. Kulik
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Abstract

We present a novel semi-analytical methodology to construct optimal linear optical circuits for heralded production of 3-photon GHZ and 2-photon Bell states. We provide a detailed description and analysis of the resulting optical schemes, which deliver success probabilities of 1/54 and 2/27 for dual-rail encoded 3-GHZ and Bell states generation, respectively. Our results improve the known constructive bounds on the success probabilities for 3-GHZ states and are of particular importance for a ballistic quantum computing model, for which these states provide an essential resource.

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F. V. Gubarev, I. V. Dyakonov, M. Yu. Saygin, G. I. Struchalin, S. S. Straupe, S. P. Kulik. 2020-04-06. Improved Heralded Schemes to Generate Entangled States From Single Photons. https://doi.org/10.1103/physreva.102.012604

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