The Quantumness of a Set of Quantum States

Details The Quantumness of a Set of Quantum States The Quantumness of a Set of Quantum States

2003-02-13

arxiv.org/abs/quant-ph/0302108v1

Physics

Quantum Physics

6 pages, no figures, requires Rinton-P9x6.cls; to appear in QCMC'02 proceedings

Scientific paper

This article is an introduction to quant-ph/0302092. We propose to quantify how "quantum" a set of quantum states is. The quantumness of a set is the worst-case difficulty of transmitting the states through a classical communication channel. Potential applications of this measure arise in quantum cryptography, where one might like to use an alphabet of states most sensitive to quantum eavesdropping, and in lab demonstrations of quantum teleportation, where it is necessary to check that entanglement has indeed been used.

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