Relaxation at different length scales in models of many-body localization

Origin of gradient terms in plasticity at different length scales

The origins of gradient terms in plasticity are discussed for three different cases related to atomic distance, dislocations, and finite grain size. 2002 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved.

the role of application of dynamic assessment approach in improvement of iranian efl writing performance at different language proficiency levels

the present study sought to investigate the role of dynamic assessment (da) in improvement of iranian efl writing performance at different language proficiency levels. to this end, after conducting the quick placement test, 60 iranian efl learners were assigned to two groups with different language proficiency levels. in both groups each participant wrote two compositions, one before and one af...

Soil Landscape Models at Different Scales Portrayed

Many-body Localization of Cold

In the seminal 1958 paper, Anderson cites the problem of spin diffusion as a motivation to study the quantum effect of localization [1]. The conclusion about the stability of a localized phase was actually reached there for a single quasiparticle hopping between sites with random, broadly distributed energies. The single-particle localization theory, applicable to various systems comprised of n...

Many-body localization phase transition

We use exact diagonalization to explore the many-body localization transition in a random-field spin-1/2 chain. We examine the correlations within each many-body eigenstate, looking at all high-energy states and thus effectively working at infinite temperature. For weak random field the eigenstates are thermal, as expected in this nonlocalized, “ergodic” phase. For strong random field the eigen...