Abstract
We study the localization of collective pair excitations in weakly interacting Bose superfluids in one-dimensional quasiperiodic lattices. The localization diagram is first determined numerically. For intermediate interaction and quasiperiodic amplitude we find a sharp localization transition, with extended low-energy states and localized high-energy states. We then develop an analytical treatment, which allows us to quantitatively map the localization transition into that of an effective multiharmonic quasiperiodic system.
| Original language | English |
|---|---|
| Article number | 061602 |
| Journal | Physical Review A - Atomic, Molecular, and Optical Physics |
| Volume | 90 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 29 Dec 2014 |
| Externally published | Yes |
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