IFLP 13074
INSTITUTO DE FISICA LA PLATA
Unidad Ejecutora - UE
artículos
Título:
Natural metric for quantum information theory
Autor/es:
P.W. LAMBERTI; M. PORTESI; J. SPARACINO
Revista:
International Journal of Quantum Information
Editorial:
World Scientific Publishing Company
Referencias:
Lugar: Singapore; Año: 2009 vol. 7 p. 1009 - 1019
ISSN:
0219-7499
Resumen:
We study in detail a very natural metric for quantum states. This new proposal has two basic ingredients: entropy and purification. The metric for two mixed states is defined as the square root of the entropy of the average of representative purifications of those states. Some basic properties are analyzed and its relation to other distances is investigated. As an illustrative application, the proposed metric is evaluated for one-qubit mixed states.
