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Title: Integrals of motion for one-dimensional Anderson localized systems

Journal Article · · New Journal of Physics
 [1];  [1];  [2];  [3]
  1. Indian Institute of Science, Bangalore (India)
  2. Rutgers Univ., Piscataway, NJ (United States)
  3. Univ. of California, Santa Cruz, CA (United States)

Anderson localization is known to be inevitable in one-dimension for generic disordered models. Since localization leads to Poissonian energy level statistics, we ask if localized systems possess ‘additional’ integrals of motion as well, so as to enhance the analogy with quantum integrable systems. Weanswer this in the affirmative in the present work. We construct a set of nontrivial integrals of motion for Anderson localized models, in terms of the original creation and annihilation operators. These are found as a power series in the hopping parameter. The recently found Type-1 Hamiltonians, which are known to be quantum integrable in a precise sense, motivate our construction.Wenote that these models can be viewed as disordered electron models with infinite-range hopping, where a similar series truncates at the linear order.Weshow that despite the infinite range hopping, all states but one are localized.Wealso study the conservation laws for the disorder free Aubry–Andre model, where the states are either localized or extended, depending on the strength of a coupling constant.Weformulate a specific procedure for averaging over disorder, in order to examine the convergence of the power series. Using this procedure in the Aubry–Andre model, we show that integrals of motion given by our construction are well-defined in localized phase, but not so in the extended phase. Lastly, we also obtain the integrals of motion for a model with interactions to lowest order in the interaction.

Research Organization:
Univ. of California, Santa Cruz, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
FG02-06ER46319
OSTI ID:
1255231
Journal Information:
New Journal of Physics, Vol. 18, Issue 3; ISSN 1367-2630
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 25 works
Citation information provided by
Web of Science

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Criterion for the occurrence of many-body localization in the presence of a single-particle mobility edge journal March 2018
Classifying transport behavior via current fluctuations in open quantum systems journal April 2019
Mobility edges in one-dimensional bichromatic incommensurate potentials journal August 2017
Many-body mobility edges in a one-dimensional system of interacting fermions journal August 2017
Many-body localization due to correlated disorder in Fock space journal April 2019
Quantum nonergodicity and fermion localization in a system with a single-particle mobility edge journal May 2016
Anomalous transport in the Aubry-André-Harper model in isolated and open systems journal May 2018
Shielding and localization in the presence of long-range hopping journal October 2016
Robustness of delocalization to the inclusion of soft constraints in long-range random models journal June 2019
Many Body Localization Due to Correlated Disorder in Fock Space text January 2019
Quantum nonergodicity and fermion localization in a system with a single-particle mobility edge text January 2016
Many-body mobility edges in a one-dimensional model of interacting fermions text January 2017
Robustness of delocalization to the inclusion of soft constraints in long-range random models text January 2019
Chirality-driven delocalization in disordered waveguide-coupled quantum arrays journal October 2022
Dynamical many-body localization in an integrable model journal August 2016
Counting local integrals of motion in disordered spinless-fermion and Hubbard chains text January 2017
Can many-body localization persist in the presence of long-range interactions or long-range hopping? text January 2019
Localisation in quasiperiodic chains: a theory based on convergence of local propagators text January 2021