| Description: | [DPS Seminar] Prof. Bishwajyoti Dey (Pune University) -- Signatures of two-step impurity mediated vortex lattice melting in Bose-Einstein Condensates |
| Date: | Monday, Dec 11, 2017 |
| Time: | 11 a.m. - 1 p.m. |
| Venue: | G02, Lecture Hall Complex |
| Details: | We simulate a rotating 2D BEC to study the order-disorder transition of a vortex lattice in presence of random impurities. Impurities are introduced either through a protocol in which vortex lattice is produced in an impurity potential or first creating the vortex lattice in the absence of random pinning and then cranking up the (co-rotating) impurity potential. We find that for a fixed strength, pinning of vortices at randomly distributed impurities leads to the new states of vortex lattice. It is unearthed that the vortex lattice follow a two-step melting via loss of positional and orientational order. Also, the comparisons between the states obtained in two protocols show that the vortex lattice states are more disordered when impurities are introduced after the formation of an ordered vortex lattice. |
| Calendar: | Seminar Calendar (entered by anandamohan) |