IFLP   13074
INSTITUTO DE FISICA LA PLATA
Unidad Ejecutora - UE
artículos
Título:
Time fluctuations in isolated quantum systems of interacting particles
Autor/es:
PABLO RENÉ ZANGARA; AXEL DAMIÁN DENTE; JONATHAN TORRES-HERRERA; HORACIO MIGUEL PASTAWSKI; ANIBAL IUCCI; LEA SANTOS
Revista:
PHYSICAL REVIEW E
Editorial:
AMER PHYSICAL SOC
Referencias:
Lugar: New York; Año: 2013 vol. 88 p. 32913 - 999999999
ISSN:
1539-3755
Resumen:
Numerically, we study the time fluctuations of few-body observables after relaxation in isolated dynamical quantum systems of interacting particles. Our results suggest that they decay exponentially with system size in both regimes, integrable and chaotic. The integrable systems considered are solvable with the Bethe ansatz and have a highly nondegenerate spectrum. This is in contrast with integrable Hamiltonians mappable to noninteracting ones. We show that the coefficient of the exponential decay depends on the level of delocalization of the initial state with respect to the energy shell.