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Many-body localization in the Fock space of natural orbitals

by Wouter Buijsman, Vladimir Gritsev, Vadim Cheianov

Submission summary

As Contributors: Wouter Buijsman
Arxiv Link: https://arxiv.org/abs/1712.06892v3 (pdf)
Date accepted: 2018-06-05
Date submitted: 2018-05-31 02:00
Submitted by: Buijsman, Wouter
Submitted to: SciPost Physics
Academic field: Physics
Specialties:
  • Condensed Matter Physics - Theory
  • Quantum Physics
Approaches: Theoretical, Computational

Abstract

We study the eigenstates of a paradigmatic model of many-body localization in the Fock basis constructed out of the natural orbitals. By numerically studying the participation ratio, we identify a sharp crossover between different phases at a disorder strength close to the disorder strength at which subdiffusive behaviour sets in, significantly below the many-body localization transition. We repeat the analysis in the conventionally used computational basis, and show that many-body localized eigenstates are much stronger localized in the Fock basis constructed out of the natural orbitals than in the computational basis.

Ontology / Topics

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Disordered systems Many-body localization (MBL) Subdiffusion

Published as SciPost Phys. 4, 038 (2018)



List of changes

Besides the changes mentioned in the reply to the referee report, in Figure 3 we have duplicated the $L=16$ data to both the left and right panel.

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