Geodynamics in meta spacetime

Qian Niu
University of Texas Austin and University of Science and Technology, China
Friday, September 2, 2022
11:00 am
RH 142


Semiclassical theory of Bloch particles has provided the basis for our understanding of crystalline metals, semiconductors and insulators.  Berry curvatures deform the phase-space symplectic structure into a non-canonical form, and are accountable for a large number of thermodynamic and transport phenomena in solid state physics.  In this talk, I will extend our theory into spacetime crystals, taking an atomic chain with a phonon mode as an example, and obtain a set of geodynamic equations of motion for an event wavepacket in the phase space of spacetime and their reciprocals.  I will also consider the case with crystal deformation, discuss how an associated lattice connection may seamlessly combine with the Berry connection to establish a covariant semiclassical theory, with applications on the issue of flexo-electricity and magnetism, etc.  My talk will end with a geodynamic formulation for a deformed spacetime crystal, and its surprising formal simplicity compares well with the elegance of particle dynamics in general relativity.

Ruqian Wu