| Description: | [DPS Seminar] Dr. Rajdeep Sensarma (TIFR, Mumbai) -- Novel Phenomena in Cold Atoms: Ferromagnetic Response of a " High Temperature " Quantum Antiferromagnet |
| Date: | Wednesday, Jan 28, 2015 |
| Time: | 4 p.m. - 6 p.m. |
| Venue: | G02, Lecture Hall Complex |
| Details: | Precise implementation of quantum many-body lattice Hamiltonians with ultracold atoms has provided a novel platform to study strongly interacting many-body physics relevant to condensed matter systems like high temperature superconductors. One of the main goals of cold atom experiments now is to observe antiferromagnetic spin ordering of fermions in a repulsive Hubbard model. In this talk I will show that a closely related system, called the ionic Hubbard model, provides a better chance of observing antiferromagnetic ordering in fermions. I will also discuss a strange phenomenon, that the antiferromagnetically ordered system actually shows a ferromagnetic dynamic response in a wide temperature range. |
| Calendar: | Seminar Calendar (entered by anandamohan) |