Time fluctuations in isolated quantum systems of interacting particles

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 solva...

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Autores principales: Zangara, Pablo R., Dente, Axel D., Torres Herrera, E. J., Pastawski, Horacio M., Iucci, Carlos Aníbal, Santos, Lea F.
Formato: Articulo
Lenguaje:Inglés
Publicado: 2013
Materias:
Ciencias Exactas
Física
time fluctuations
integrable systems
coefficient of the exponential decay
delocalization
energy shell
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/126075
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-126075
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
Física
time fluctuations
integrable systems
coefficient of the exponential decay
delocalization
energy shell
spellingShingle Ciencias Exactas
Física
time fluctuations
integrable systems
coefficient of the exponential decay
delocalization
energy shell
Zangara, Pablo R.
Dente, Axel D.
Torres Herrera, E. J.
Pastawski, Horacio M.
Iucci, Carlos Aníbal
Santos, Lea F.
Time fluctuations in isolated quantum systems of interacting particles
topic_facet Ciencias Exactas
Física
time fluctuations
integrable systems
coefficient of the exponential decay
delocalization
energy shell
description 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.
format Articulo
Articulo
author Zangara, Pablo R.
Dente, Axel D.
Torres Herrera, E. J.
Pastawski, Horacio M.
Iucci, Carlos Aníbal
Santos, Lea F.
author_facet Zangara, Pablo R.
Dente, Axel D.
Torres Herrera, E. J.
Pastawski, Horacio M.
Iucci, Carlos Aníbal
Santos, Lea F.
author_sort Zangara, Pablo R.
title Time fluctuations in isolated quantum systems of interacting particles
title_short Time fluctuations in isolated quantum systems of interacting particles
title_full Time fluctuations in isolated quantum systems of interacting particles
title_fullStr Time fluctuations in isolated quantum systems of interacting particles
title_full_unstemmed Time fluctuations in isolated quantum systems of interacting particles
title_sort time fluctuations in isolated quantum systems of interacting particles
publishDate 2013
url http://sedici.unlp.edu.ar/handle/10915/126075
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