Interaction-disorder competition in a spin system evaluated through the Loschmidt echo

The interplay between interactions and disorder in closed quantum many-body systems is relevant for thermalization phenomenon. In this paper, we address this competition in an infinite temperature spin system by means of the Loschmidt echo (LE), which is based on a time reversal procedure. This quan...

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Detalles Bibliográficos
Autores principales: Zangara, Pablo René, Dente, Axel Damián, Iucci, Carlos Aníbal, Levstein, Patricia Rebeca, Pastawski, Horacio Miguel
Formato: Articulo Preprint
Lenguaje:Inglés
Publicado: 2013
Materias:
Física
Disorder
Spin chain
Quench
Loschmidt echo
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/98625
https://ri.conicet.gov.ar/11336/23720
http://prb.aps.org/abstract/PRB/v88/i19/e195106
https://arxiv.org/abs/1305.0408
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-98625
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Física
Disorder
Spin chain
Quench
Loschmidt echo
spellingShingle Física
Disorder
Spin chain
Quench
Loschmidt echo
Zangara, Pablo René
Dente, Axel Damián
Iucci, Carlos Aníbal
Levstein, Patricia Rebeca
Pastawski, Horacio Miguel
Interaction-disorder competition in a spin system evaluated through the Loschmidt echo
topic_facet Física
Disorder
Spin chain
Quench
Loschmidt echo
description The interplay between interactions and disorder in closed quantum many-body systems is relevant for thermalization phenomenon. In this paper, we address this competition in an infinite temperature spin system by means of the Loschmidt echo (LE), which is based on a time reversal procedure. This quantity has been formerly employed to connect quantum and classical chaos, and in the present many-body scenario we use it as a dynamical witness. We assess the LE time scales as a function of disorder and interaction strengths. The strategy enables a qualitative phase diagram that shows the regions of ergodic and nonergodic behavior of the polarization under the echo dynamics.
format Articulo
Preprint
author Zangara, Pablo René
Dente, Axel Damián
Iucci, Carlos Aníbal
Levstein, Patricia Rebeca
Pastawski, Horacio Miguel
author_facet Zangara, Pablo René
Dente, Axel Damián
Iucci, Carlos Aníbal
Levstein, Patricia Rebeca
Pastawski, Horacio Miguel
author_sort Zangara, Pablo René
title Interaction-disorder competition in a spin system evaluated through the Loschmidt echo
title_short Interaction-disorder competition in a spin system evaluated through the Loschmidt echo
title_full Interaction-disorder competition in a spin system evaluated through the Loschmidt echo
title_fullStr Interaction-disorder competition in a spin system evaluated through the Loschmidt echo
title_full_unstemmed Interaction-disorder competition in a spin system evaluated through the Loschmidt echo
title_sort interaction-disorder competition in a spin system evaluated through the loschmidt echo
publishDate 2013
url http://sedici.unlp.edu.ar/handle/10915/98625
https://ri.conicet.gov.ar/11336/23720
http://prb.aps.org/abstract/PRB/v88/i19/e195106
https://arxiv.org/abs/1305.0408
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