Many-body localization in a quasiperiodic Fibonacci chain
We study the many-body localization (MBL) properties of a chain of interacting fermions subject to a quasiperiodic potential such that the non-interacting chain is always delocalized and displays multifractality. Contrary to naive expectations, adding interactions in this systems does not enhance de...
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Published in | SciPost physics Vol. 6; no. 4; p. 050 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
SciPost Foundation
01.04.2019
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Online Access | Get full text |
ISSN | 2542-4653 2542-4653 |
DOI | 10.21468/SciPostPhys.6.4.050 |
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Abstract | We study the many-body localization (MBL) properties of a chain of
interacting fermions subject to a quasiperiodic potential such that the
non-interacting chain is always delocalized and displays
multifractality. Contrary to naive expectations, adding interactions in
this systems does not enhance delocalization, and a MBL transition is
observed. Due to the local properties of the quasiperiodic potential,
the MBL phase presents specific features, such as additional peaks in
the density distribution. We furthermore investigate the fate of
multifractality in the ergodic phase for low potential values. Our
analysis is based on exact numerical studies of eigenstates and
dynamical properties after a quench. |
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AbstractList | We study the many-body localization (MBL) properties of a chain of interacting fermions subject to a quasiperiodic potential such that the non-interacting chain is always delocalized and displays multifractality. Contrary to naive expectations, adding interactions in this systems does not enhance delocalization, and a MBL transition is observed. Due to the local properties of the quasiperiodic potential, the MBL phase presents specific features, such as additional peaks in the density distribution. We furthermore investigate the fate of multifractality in the ergodic phase for low potential values. Our analysis is based on exact numerical studies of eigenstates and dynamical properties after a quench. We study the many-body localization (MBL) properties of a chain of interacting fermions subject to a quasiperiodic potential such that the non-interacting chain is always delocalized and displays multifractality. Contrary to naive expectations, adding interactions in this systems does not enhance delocalization, and a MBL transition is observed. Due to the local properties of the quasiperiodic potential, the MBL phase presents specific features, such as additional peaks in the density distribution. We furthermore investigate the fate of multifractality in the ergodic phase for low potential values. Our analysis is based on exact numerical studies of eigenstates and dynamical properties after a quench. |
ArticleNumber | 050 |
Author | Alet, Fabien Laflorencie, Nicolas Macé, Nicolas |
Author_xml | – sequence: 1 givenname: Nicolas surname: Macé fullname: Macé, Nicolas organization: Laboratoire de Physique Théorique Toulouse – sequence: 2 givenname: Nicolas surname: Laflorencie fullname: Laflorencie, Nicolas organization: Laboratoire de Physique Théorique Toulouse – sequence: 3 givenname: Fabien surname: Alet fullname: Alet, Fabien organization: Laboratoire de Physique Théorique Toulouse |
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Snippet | We study the many-body localization (MBL) properties of a chain of
interacting fermions subject to a quasiperiodic potential such that the
non-interacting... We study the many-body localization (MBL) properties of a chain of interacting fermions subject to a quasiperiodic potential such that the non-interacting... |
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Title | Many-body localization in a quasiperiodic Fibonacci chain |
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