72 citations · 168 across the 4 of their papers we have counts for
4 papers
Spin polarization through Floquet resonances in a driven central spin model
Pieter W. Claeys, Stijn De Baerdemacker, Omar El Araby +1
Adiabatically varying the driving frequency of a periodically-driven many-body quantum system can induce controlled transitions between resonant eigenstates of the time-averaged Ha…
Exceptional and regular spectra of a generalized Rabi model
Michael Tomka, Omar El Araby, Mikhail Pletyukhov +1
We study the spectrum of the generalized Rabi model in which co- and counter-rotating terms have different coupling strengths. It is also equivalent to the model of a two-dimension…
Order parameter, correlation functions and fidelity susceptibility for the BCS model in the thermodynamic limit
Omar El Araby, Dionys Baeriswyl
The exact ground state of the reduced BCS Hamiltonian is investigated numerically for large system sizes and compared with the BCS ansatz. A "canonical'' order parameter is found t…
Bethe Ansatz and Ordinary Differential Equation Correspondence for Degenerate Gaudin Models
Omar El Araby, Vladimir Gritsev, Alexandre Faribault
In this work, we generalize the numerical approach to Gaudin models developed earlier by us to degenerate systems showing that their treatment is surprisingly convenient from a num…