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Past Events
JITCP Seminar: Particle world view in crystals (Organized by the HKU-UCAS Joint Institute of Theoretical and Computational Physics)
| Speaker: | Prof. Qian NIU |
| Affiliation: | University of Science and Technology of China |
| Date: | January 19, 2023 (Thursday) |
| Time: | 4:00 p.m. |
| Venue: | [In Person] Room 522, 5/F, Chong Yuet Ming Physics Building, The University of Hong Kong [Zoom] https://hku.zoom.us/j/91647616307?pwd=Y1IyT3QrTndMbXhXeVNPUVlMZ3RQdz09 Meeting ID: 916 4761 6307 Password: 25600 |
Abstract
I will present a world view for electrons in crystals based the semiclassical dynamics and describe how the Berry curvatures modify the thermodynamic and transport properties. I will then extend this point of view to spacetime crystals by introducing the concept of an even wavepacket, the quantum version of the classical event point in spacetime. I will also describe spatial and temporal deformation, first in 3d crystals, using a geodynamic language, and obtain Hall viscosity, flexsoelectric and flexsomagnetic responses. When the results are extended to 4d spacetime crystals, the geodynamics becomes greatly simplified and unified, allowing a fresh look of table-top general relativity.
Anyone interested is welcome to attend.