Artículos de revistas
An analytical relation between entropy production and quantum Lyapunov exponents for Gaussian bipartite systems
Fecha
2008Registro en:
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL, v.41, n.11, 2008
1751-8113
10.1088/1751-8113/41/11/115303
Autor
Fonseca Romero, Karem Milena
Parreira, Julia Esteves
Souza, Leonardo Antônio Mendes de
Nemes, Maria Carolina
Wreszinski, Walter Felipe
Institución
Resumen
We study and compare the information loss of a large class of Gaussian bipartite systems. It includes the usual Caldeira-Leggett-type model as well as Anosov models ( parametric oscillators, the inverted oscillator environment, etc), which exhibit instability, one of the most important characteristics of chaotic systems. We establish a rigorous connection between the quantum Lyapunov exponents and coherence loss, and show that in the case of unstable environments coherence loss is completely determined by the upper quantum Lyapunov exponent, a behavior which is more universal than that of the Caldeira-Leggett-type model.