| Autor: |
Lin, Sheng-Hsuan, Sbierski, B., Dorfner, F., Karrasch, C., Heidrich-Meisner, F. |
| Rok vydání: |
2017 |
| Předmět: |
|
| Zdroj: |
SciPost Phys. 4, 002 (2018) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.21468/SciPostPhys.4.1.002 |
| Popis: |
We study the finite-energy density phase diagram of spinless fermions with attractive interactions in one dimension in the presence of uncorrelated diagonal disorder. Unlike the case of repulsive interactions, a delocalized Luttinger-liquid phase persists at weak disorder in the ground state, which is a well-known result. We revisit the ground-state phase diagram and show that the recently introduced occupation-spectrum discontinuity computed from the eigenspectrum of one-particle density matrices is noticeably smaller in the Luttinger liquid compared to the localized regions. Moreover, we use the functional renormalization scheme to study the finite-size dependence of the conductance, which resolves the existence of the Luttinger liquid as well and is computationally cheap. Our main results concern the finite-energy density case. Using exact diagonalization and by computing various established measures of the many-body localization-delocalization transition, we argue that the zero-temperature Luttinger liquid smoothly evolves into a finite-energy density ergodic phase without any intermediate phase transition. |
| Databáze: |
arXiv |
| Externí odkaz: |
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