5,581 research outputs found
Delocalization of weakly interacting bosons in a 1D quasiperiodic potential
We consider weakly interacting bosons in a 1D quasiperiodic potential
(Aubry-Azbel-Harper model) in the regime where all single-particle states are
localized. We show that the interparticle interaction may lead to the many-body
delocalization and we obtain the finite-temperature phase diagram.
Counterintuitively, in a wide range of parameters the delocalization requires
stronger cou- pling as the temperature increases. This means that the system of
bosons can undergo a transition from a fluid to insulator (glass) state under
heating
Finite-Temperature Fluid-Insulator Transition of Strongly Interacting 1D Disordered Bosons
We consider the many-body localization-delocalization transition for strongly
interacting one- dimensional disordered bosons and construct the full picture
of finite temperature behavior of this system. This picture shows two
insulator-fluid transitions at any finite temperature when varying the
interaction strength. At weak interactions an increase in the interaction
strength leads to insulator->fluid transition, and for large interactions one
has a reentrance to the insulator regime
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