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Many-body localization in the Fock space of natural orbitals

by Wouter Buijsman, Vladimir Gritsev, Vadim Cheianov

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Submission summary

Authors (as Contributors): Wouter Buijsman
Submission information
Arxiv Link: (pdf)
Date accepted: 2018-06-05
Date submitted: 2018-05-31 02:00
Submitted by: Buijsman, Wouter
Submitted to: SciPost Physics
Ontological classification
Academic field: Physics
  • Condensed Matter Physics - Theory
  • Quantum Physics
Approaches: Theoretical, Computational


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.

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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