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Delocalization of weakly interacting bosons in a 1D quasiperiodic potential

Abstract : 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.
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https://hal.archives-ouvertes.fr/hal-01052752
Contributor : Géraldine Regis <>
Submitted on : Monday, July 28, 2014 - 4:20:17 PM
Last modification on : Friday, December 18, 2020 - 6:46:05 PM

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  • HAL Id : hal-01052752, version 1
  • ARXIV : 1402.4796

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V. P. Michal, B. L. Altshuler, G. V. Shlyapnikov. Delocalization of weakly interacting bosons in a 1D quasiperiodic potential. Physical Review Letters, American Physical Society, 2014, 113, pp.045304. ⟨hal-01052752⟩

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