4 papers
Time-dependent Berry curvature and quantum metric of Floquet-Bloch states
S. Sajad Dabiri, Reza Asgari
The quantum geometry of Bloch bands, characterized by the Berry curvature and the quantum metric, underpins a wide range of linear and nonlinear responses in static systems. Here,…
Nonlinear Optical Response in Pseudo-Hermitian Systems at Steady State
S. Sajad Dabiri, Reza Asgari
We establish a steady-state theory for nonlinear optical conductivity in pseudo-Hermitian systems. We derive compact formulas for the first and second order conductivity tensors in…
Velocity gauge formulation of nonlinear optical response in Floquet-driven systems
S. Sajad Dabiri, Reza Asgari
Using the velocity gauge formalism, we develop a theoretical framework for computing the nonlinear optical responses of time-periodic quantum systems. This approach complements the…
Dynamical nonlinear optical response in time-periodic quantum systems
S. Sajad Dabiri, Reza Asgari
We present a comprehensive theoretical framework for calculating the linear and nonlinear optical responses of time-periodic quantum systems. Using density matrix evolution in the…