Abstract
Localization in interacting systems caused by disorder, known as many-body localization (MBL), has attracted a lot of attention in recent years. Most systems studied in this context also show single-particle localization, and the question of MBL is whether the phenomena survives the effects of interactions. It is intriguing to consider a system with no single-particle localization but which does localize in the presence of many particles. The localization phenomena occurs “due to” rather than “in spite of” interactions in such systems. We consider a simple bosonic system and show that interactions enhance the effects of very weak disorder and result in localization when many particles are present. We provide physical insights into the mechanism involved and support our results with analytical and numerical calculations. (Figure presented.).
| Original language | English |
|---|---|
| Article number | 1600309 |
| Journal | Annalen der Physik |
| Volume | 529 |
| Issue number | 7 |
| DOIs | |
| State | Published - Jul 2017 |
Bibliographical note
Publisher Copyright:© 2017 by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Funding
We thank Yevgeny Bar-Lev, Richard Berkovits, Emanuele Dalla Torre, Shmuel Fishman, Aditi Mitra and Ganpathy Murthy for helpful discussions. This work is supported by the Israel Science Foundation, grant N. 231/14. RS also thanks the Israel Council for Higher Education's Planning and Budgeting Committee (CHE/PBC) and the Israel Science Foundation grant N. 1452/14 for financial support.
| Funders | Funder number |
|---|---|
| Israel Science Foundation | N. 231/14 |
| Council for Higher Education | |
| Planning and Budgeting Committee of the Council for Higher Education of Israel | N. 1452/14 |
Keywords
- Bose-Hubbard model
- disordered quantum system
- many-body localization (MBL)