Debamalya Dutta
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View article: Probing Fermi surface topology by ultrafast pump pulse dynamics
Probing Fermi surface topology by ultrafast pump pulse dynamics Open
We present a dynamical approach to detect changes in Fermi surface topology in a two-band model. Specifically, we show that the system's response to a low intensity light pulse can precisely identify topological Lifshitz transitions. At a …
View article: Frequency-selective amplification of nonlinear response in strongly correlated bosons
Frequency-selective amplification of nonlinear response in strongly correlated bosons Open
We present a protocol to generate enhanced non-linear responses of incident pulses in the density wave phase within the extended Bose-Hubbard model using the concept of resonance-induced amplification (RIA). This method enables the selecti…
View article: Nonlinear response of interacting bosons in a quasiperiodic potential
Nonlinear response of interacting bosons in a quasiperiodic potential Open
We theoretically study the electric pulse-driven non-linear response of interacting bosons loaded in an optical lattice in the presence of an incommensurate superlattice potential. In the non-interacting limit $(U=0)$, the model admits bot…