Schemes for quantum key distribution with higher-order alphabets using single-photon fractional Fourier optics |
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Data do cadastro: 10/04/2012 |
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Publicação/Divulgação: 13/06/2008 |
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Resp. pelo cadastro:
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Status atual: Publicado |
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Esta publicação está vinculada a uma tese? Não |
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Vínculo com algum programa de bolsa do CBPF: Não |
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Tipo de produção: Texto em revista |
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Data da divulgação: 13/06/2008 |
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Resumo: We propose generalized quantum key distribution schemes using spatially encoded d-dimensional qudits based on fractional Fourier transform operations. We determine the necessary conditions on the orders of the transforms which ensure a shared secret random key string and briefly discuss the transmission rate and a possible encoding procedure. We also show that the fractional Fourier transform can be used to analyze more general eavesdropping strategies, including an intermediate-basis attack. The error rate and information gain for the intercept-resend and intermediate-basis attacks are briefly analyzed for a particular example. Effects of atmospheric turbulence in a free-space transmission are considered. |
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Url: http://pra.aps.org/abstract/PRA/v77/i6/e062323 |
Download do PDF (375 KB) |