9 papers
Evolution of terahertz third harmonic response across rare-earth nickelate phase-diagram
Gulloo Lal Prajapati, Igor Ilyakov, Alexey Ponomaryov +8
High harmonic generation (HHG) is a sensitive probe for investigating electronic structures and dynamics of materials and a source for attosecond pulses. In particular, HHG with te…
Exploring bosonic bound states with parallel reaction coordinates
Guan-Yu Lai, Friedemann QueiÃer, Gernot Schaller
Bound states are dissipation-resilient states that may emerge when quantum systems are strongly coupled to reservoirs with band gaps. We analyze an exactly solvable bosonic model f…
Disorder-induced localisation in the Mott-Hubbard model
RiÄards Kristers KnipÅ¡is, Friedemann Queisser, Jesumony Jayabalan +4
For the Fermi-Hubbard model in the Mott insulator phase, we employ the hierarchy of correlations to study how doublon and holon quasi-particle excitations are affected by adding di…
Higher harmonics in Mott-Hubbard insulators as sensors
Abdelrahman Azab, Friedemann Queisser, Gulloo Lal Prajapati +2
Using strong-coupling time-dependent perturbation theory, we study the response of Mott and charge-transfer insulators to an oscillating electric field. We derive analytical expres…
Finite-time performance of a cyclic 2d quantum Ising heat engine
S. P. Katoorani, C. Kohlfürst, F. Queisser +2
We discuss the limit cycle regime of a finite-time quantum Otto cycle with a frictionless two-dimensional anisotropic Ising model as the working fluid. From Onsagers exact equilibr…
Magneto-photoelectric effect in graphene via tailored potential landscapes
Joris Josiek, Friedemann Queisser, Stephan Winnerl +1
We consider the propagation of charge carriers in planar graphene under the combined influence of a constant transversal magnetic field and an in-plane varying electric potenti…