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Many-body localization in the Fock space of natural orbitals
by Wouter Buijsman, Vladimir Gritsev, Vadim Cheianov
This is not the current version.
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 marking the onset of
eigenstate localization at a disorder strength 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.
Has been resubmitted
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List of changes
Besides the changes mentioned in the replies to the referee reports, we have made the following changes:
- We have re-organized Section 4 in view of the new content added.
- We have updated Ref.  of the revised manuscript from the arXiv to the published version, added Ref.  of the revised manuscript, and removed Ref.  of the original manuscript as the relevant content is also covered in Ref.  of the original manuscript.
- We made several minor changes in the text and graphics with the aim of increasing clarity and/or readibility.