Speaker:
Qian Niu
Institution:
UT Austin and USTC
Date:
Thursday, June 8, 2023
Time:
11:00 am
Location:
RH 142
Abstract:
I will present a world view for electrons in crystals based the semiclassical dynamics and describe how the Berry curvatures modifythe thermodynamic and transport properties. I will then extend this point of view to spacetime crystals by introducing the concept of an event 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.
Host:
Ruqian Wu