Year: 2009
Type: article
Abstract: We revisit the notion of using divergences, or relative-entropies, as \nmeasures of the distance between two mixed states, with special emphasis \non power-law entropies. We analyze the Csisz´ar and Bregmantype \nq-divergences with reference to i) Werner states, and ii) thermal \nstates obtained using a one-dimensional Heisenberg two-spin chain with \na magnetic field B along the z-axis. In both cases, we find that the \nq-Jensen-Shannon divergence enlarges the range of permissible powerlaw \nexponents, as compared to results of previous literature. It is also \nshown that this divergence-measure serves as a good indicator for critical \nphenomena in the Heisenberg model.
Authors: A. Borrás, A. Plastino, M. Casas
Language: English
Subfield: Statistical and Nonlinear Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W1553681169