In the infinite random XXZ chain, energy-restricted Heisenberg evolution is approximated by observables on logarithmically growing supports, proving a logarithmic light cone in any fixed low-energy interval.
Localization in the random XXZ quantum spin chain
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Many-body localization for the random XXZ spin chain in fixed energy intervals
In the infinite random XXZ chain, energy-restricted Heisenberg evolution is approximated by observables on logarithmically growing supports, proving a logarithmic light cone in any fixed low-energy interval.