Properties of q-entropies
- 1 September 1995
- journal article
- Published by AIP Publishing in Journal of Mathematical Physics
- Vol. 36 (9) , 4785-4791
- https://doi.org/10.1063/1.530920
Abstract
Basic properties of the q-entropy Sq[ρ]=(q−1)−1(1−tr(ρq)) (0<q≠1) for states of a quantum system are established: concavity, quasi-convexity, continuity, and failure of ‘‘additivity’’ and ‘‘subadditivity’’ for composite systems.Keywords
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