| Autor: |
Lüschen, Henrik P., Scherg, Sebastian, Kohlert, Thomas, Schreiber, Michael, Bordia, Pranjal, Li, Xiao, Sarma, S. Das, Bloch, Immanuel |
| Rok vydání: |
2017 |
| Předmět: |
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| Zdroj: |
Phys. Rev. Lett. 120, 160404 (2018) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevLett.120.160404 |
| Popis: |
A single-particle mobility edge (SPME) marks a critical energy separating extended from localized states in a quantum system. In one-dimensional systems with uncorrelated disorder, a SPME cannot exist, since all single-particle states localize for arbitrarily weak disorder strengths. However, if correlations are present in the disorder potential, the localization transition can occur at a finite disorder strength and SPMEs become possible. In this work, we find experimental evidence for the existence of such a SPME in a one-dimensional quasi-periodic optical lattice. Specifically, we find a regime where extended and localized single-particle states coexist, in good agreement with theoretical simulations, which predict a SPME in this regime. |
| Databáze: |
arXiv |
| Externí odkaz: |
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