48 citations · 84 across the 7 of their papers we have counts for
7 papers
Accuracy of the adiabatic-impulse approximation for closed and open quantum systems
Michael Tomka, Lorenzo Campos Venuti, Paolo Zanardi
We study the adiabatic-impulse approximation (AIA) as a tool to approximate the time evolution of quantum states, when driven through a region of small gap. The AIA originates from…
Geodesic Paths for Quantum Many-Body Systems
Michael Tomka, Tiago Souza, Steven Rosenberg +1
We propose a method to obtain optimal protocols for adiabatic ground-state preparation near the adiabatic limit, extending earlier ideas from [D. A. Sivak and G. E. Crooks, Phys. R…
Enabling Adiabatic Passages Between Disjoint Regions in Parameter Space through Topological Transitions
Tiago Souza, Michael Tomka, Michael Kolodrubetz +2
We explore topological transitions in parameter space in order to enable adiabatic passages between regions adiabatically disconnected within a given parameter manifold. To this en…
Dynamically generated darkness in the Dicke model
Michael Tomka, Dionys Baeriswyl, Vladimir Gritsev
We study the dynamics of a driven Dicke model, where the collective spin is rotated with a constant velocity around a fixed axis. The time evolution of the mean photon number and o…
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…
Dynamics of the rotated Dicke model
Michael Tomka, Vladimir Gritsev
We study quantum dynamics of the rotationally driven Dicke model where the collective spin is rotated around the z axis with a finite velocity. In the absence of the rotating wave…
Geometric phase contribution to quantum non-equilibrium many-body dynamics
Michael Tomka, Anatoli Polkovnikov, Vladimir Gritsev
We study the influence of geometry of quantum systems underlying space of states on its quantum many-body dynamics. We observe an interplay between dynamical and topological ingred…