| Description: | [DPS Seminar] Prof. Dilip Angom (PRL, Ahmedabad) -- Ultracold atoms in optical lattices with disorder |
| Date: | Thursday, Nov 22, 2018 |
| Time: | 2 p.m. - 3:30 p.m. |
| Venue: | G08, Lecture Hall Complex |
| Details: | We study the effect of diagonal disorder on zero and finite temperature phase diagrams of ultracold atoms in two dimensional optical lattices. The system is analysed using the Bose Hubbard model, and we employ the single site and cluster Gutzwiller mean field theories. The introduction of disorder results in the formation of Bose glass phase, and inhibits direct transition from Mott insulator to superfluid phase. The use of cluster Gutzwiller mean field improves the correlation and there is enlargement of the Bose glass phase region. Similar enlargement is observed on introducing artificial gauge field. More importantly, to relate with the experimental realization we include finite temperature effects, and this leads to melting of Bose glass as well as the Mott insulator phase. |
| Calendar: | Seminar Calendar (entered by anandamohan) |