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arXiv · 0811.2312

Complementarity of information sent via different bases

Shengjun Wu·Sixia Yu·Klaus Mølmer
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Abstract

We discuss quantitatively the complementarity of information transmitted by a quantum system prepared in a basis state in one out of several different mutually unbiased bases (MUBs). We obtain upper bounds on the information available to a receiver who has no knowledge of which MUB was chosen by the sender. These upper bounds imply a complementarity of information encoded via different MUBs and ultimately ensure the security in quantum key distribution protocols.

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Shengjun Wu, Sixia Yu, Klaus Mølmer. 2009-02-10. Complementarity of information sent via different bases. https://doi.org/10.1103/physreva.79.022320

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