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Integrals of motion in the many-body localized phase

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Ros, V., Müller, M., Scardicchio, A.·2015·Nuclear Physics B

Abstract

We construct a complete set of quasi-local integrals of motion for the many-body localized phase of interacting fermions in a disordered potential. The integrals of motion can be chosen to have binary spectrum {0,1}, thus constituting exact quasiparticle occupation number operators for the Fermi insulator. We map the problem onto a non-Hermitian hopping problem on a lattice in operator space. We show how the integrals of motion can be built, under certain approximations, as a convergent series in the interaction strength. An estimate of its radius of convergence is given, which also provides an estimate for the many-body localization–delocalization transition. Finally, we discuss how the properties of the operator expansion for the integrals of motion imply the presence or absence of a finite temperature transition.

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Metadata

Authors
Ros, V., Müller, M., & Scardicchio, A.
Venue
Nuclear Physics B
Publisher
Elsevier BV
Published
2015-02
Volume
891
Pages
420-465
ISSN
0550-3213 (ISSN-L)
OpenAlex
W1990965852
Cited by
505
References
2
FWCI
27.45
Type
journal article
Language
en
Open access
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CoChat. (2026). Citation check: Integrals of motion in the many-body localized phase. https://app.cochat.ai/papers/10.1016/j.nuclphysb.2014.12.014
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Ros, V., Müller, M., & Scardicchio, A. (2015). Integrals of motion in the many-body localized phase. Nuclear Physics B. https://doi.org/10.1016/j.nuclphysb.2014.12.014

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Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.