Absence of superdiffusion in the quasiperiodic spin chain at weak integrability breaking
arXiv:2012.07488 · doi:10.1103/PhysRevB.103.237101
Abstract
There has been interest in the spin transport properties of the Aubry-Andre-Harper model at high temperatures under weak integrability breaking, in particular for small interactions or small fields. We present old unpublished and new results that show that the model is diffusive, meaning that the claimed superdiffusion [1,2] is a finite-size effect.
References in corpus (7)
- Diffusive and subdiffusive spin transport in the ergodic phase of a many-body localizable system
- Transport in quasiperiodic interacting systems: from superdiffusion to subdiffusion
- Interaction instability of localization in quasiperiodic systems
- Weak integrability breaking: chaos with integrability signature in coherent diffusion
- Phenomenology of anomalous transport in disordered one-dimensional systems
- Non-equilibrium steady state phases of the interacting Aubry-Andre-Harper model
- Ballistic-to-diffusive transition in spin chains with broken integrability