Detecting eve in communication with continuous-variable Einstein-Podolsky-Rosen correlations
We study the validity of the entanglement parameter introduced in a recent publication by Guangqiang et al. Phys. Rev. A 73 012314 (2006)] for detecting Eve, the eavesdropper. We have found that Eve can be detected using this parameter only if Alice establishes a quantum correlation between the Eins...
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| Format: | Article |
| Language: | English |
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2007
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| Online Access: | http://irep.iium.edu.my/22045/ http://irep.iium.edu.my/22045/1/pra.pdf |
| Summary: | We study the validity of the entanglement parameter introduced in a recent publication by Guangqiang et al. Phys. Rev. A 73 012314 (2006)] for detecting Eve, the eavesdropper. We have found that Eve can be detected using this parameter only if Alice establishes a quantum correlation between the Einstein-Podolsky-Rosen (EPR) pair. This quantum correlation is related to the possibility of an apparent violation of the Heisenberg inequality for the quadrature components of the EPR pair. |
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