INSTITUTO DE INVESTIGACIONES FISICAS DE MAR DEL PLATA
Unidad Ejecutora - UE
Quantum non-Markovian behavior at the chaos border
I. GARCÍA-MATA; CARLOS PINEDA; DIEGO A. WISNIACKI
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
IOP PUBLISHING LTD
Lugar: Londres; Año: 2014 vol. 47 p. 115301 - 115301
In this work we study the non-Markovian behavior of a qubit coupled to an environment in which the corresponding classical dynamics change from integrable to chaotic. We show that in the transition region, where the dynamics has both regular islands and chaotic areas, the average non-Markovian behavior is enhanced to values even larger than those in the regular regime. This effect can be related to the non-Markovian behavior as a function of the initial state of the environment, where maxima are attained at the regions dividing separate areas in classical phase space, particularly at the borders between chaotic and regular regions. Moreover, we show that the fluctuations of the fidelity of the environment?which determine the non-Markovianity measure?give a precise image of the classical phase portrait.