4 papers
Non-Markovian resonance fluorescence
Abhishek Kumar
We derive a general formula for the non-Markovian fluorescence spectrum of a multi-level system interacting with a bosonic environment. To this end, we apply linear-response theory…
Linear Response Theory and Optical Conductivity of Floquet Topological Insulators
Abhishek Kumar, M. Rodriguez-Vega, T. Pereg-Barnea +1
Motivated by the quest for experimentally accessible dynamical probes of Floquet topological insulators, we formulate the linear response theory of a periodically driven system. We…
Polaron mobility in the "beyond quasiparticles" regime
Andrey S. Mishchenko, Lode Pollet, Nikolay V. Prokof'ev +3
In a number of physical situations, from polarons to Dirac liquids and to non-Fermi liquids, one encounters the "beyond quasiparticles" regime, in which the inelastic scattering ra…
Higher-order Floquet topological phases with corner and bulk bound states
Martin Rodriguez-Vega, Abhishek Kumar, Babak Seradjeh
We report the theoretical discovery and characterization of higher-order Floquet topological phases dynamically generated in a periodically driven system with mirror symmetries. We…