58 citations · 110 across the 10 of their papers we have counts for
Showing 2026Show all
2 papers · 1 filter
cond-mat.mtrl-sci2026
Generalized length-gauge time-dependent Liouville equation
G. P. Zhang, M. S. Si
The length-gauge (LG) time-dependent Liouville equation is a major workhorse to simulate ultrafast dynamics. The equation features the commutator between the density operator $\hat…
cond-mat.mtrl-sci2026
Beyond Local Berry Geometry: A First-Principles Finite-Momentum Theory of Electronic Position
M. S. Si, Y. Q. Li, G. P. Zhang
Electronic position controls how a crystal polarizes and responds to an external field. In crystals, it is usually described through local changes of electronic states in momentum…