Local transformations of superpositions of entangled states |
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Authors: | Iulia Ghiu |
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Institution: | Centre for Advanced Quantum Physics, University of Bucharest, PO Box MG-11, R-077125, Bucharest-M?gurele, Romania |
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Abstract: | Suppose that we have two entangled states |?1〉, |ψ1〉 that cannot be converted to any of other two states |?2〉, |ψ2〉 by local operations and classical communication. We analyze the possibility of locally transforming a superposition of |?1〉 and |ψ1〉 into a superposition of |?2〉 and |ψ2〉. By using the Nielsen's theorem we find the necessary and sufficient conditions for this conversion to be performed. |
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Keywords: | 03 65 Ud 03 67 -a |
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