Two measures of sensitivity to eavesdropping for alphabets of quantum states were recently introduced by Fuchs and Sasaki in quant-ph/0302092. These are the accessible fidelity and quantumness. In this paper we prove an important property of both measures: The are multiplicative under tensor products. The proof in the case of accessible fidelity shows a connection between the measure and characteristics of entanglement-breaking quantum channels.
|Translated title of the contribution||Multiplicativity of accessible fidelity and quantumness for sets of quantum states|
|Pages (from-to)||1 - 11|
|Journal||Quantum Information and Computation|
|Publication status||Published - Jan 2004|
Bibliographical notePublisher: Rinton Press, Inc
Other identifier: IDS Number: 804JC