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Quantum secure identification using entanglement and catalysis

Howard N. Barnum
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Abstract

I consider the use of entanglement between two parties to enable one to authenticate her identity to another over a quantum communication channel. Exploiting the phenomenon of entanglement-catalyzed transformations between pure states gives a potentially reusable entangled identification token. In analyzing this, I consider the independently interesting problem of the best possible approximation to a given pure entangled state realizable using local actions and classical communication by parties sharing a different entangled state.

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Howard N. Barnum. 1999-10-15. Quantum secure identification using entanglement and catalysis. https://arxiv.org/abs/quant-ph/9910072

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