73 citations · 607 across the 19 of their papers we have counts for
10 papers · 1 filter
Unified Light-Matter Floquet Theory and its Application to Quantum Communication
Georg Engelhardt, Sayan Choudhury, W. Vincent Liu
Periodically-driven quantum systems can exhibit a plethora of intriguing non-equilibrium phenomena that can be analyzed using Floquet theory. Naturally, Floquet theory is employed…
Unusual Dynamical Properties of Disordered Polaritons in Micocavities
Georg Engelhardt, Jianshu Cao
The strong light-matter interaction in microcavities gives rise to intriguing phenomena, such as cavity-mediated transport that can potentially overcome the Anderson localization.…
Dynamical symmetries of periodically-driven quantum systems and their spectroscopic signatures
Georg Engelhardt, Jianshu Cao
Spatial symmetries of quantum systems leads to important effects in spectroscopy, such as selection rules and dark states. Motivated by the increasing strength of light-matter inte…
Discontinuities in driven spin-boson systems due to coherent destruction of tunneling: breakdown of the Floquet-Gibbs distribution
Georg Engelhardt, Gloria Platero, Jianshu Cao
We show that the probability distribution of the stationary state of a dissipative ac-driven two-level system exhibits discontinuities, i.e. jumps, for parameters at which coherent…
Tuning the Aharonov-Bohm effect with dephasing in nonequilibrium transport
Georg Engelhardt, Jianshu Cao
The Aharanov-Bohm (AB) effect, which predicts that a magnetic field strongly influences the wave function of an electrically charged particle, is investigated in a three site syste…
Maxwell's demon in the quantum-Zeno regime and beyond
G. Engelhardt, G. Schaller
The long-standing paradigm of Maxwell's demon is till nowadays a frequently investigated issue, which still provides interesting insights into basic physical questions. Considering…
Random-walk topological transition revealed via electron counting
G. Engelhardt, M. Benito, G. Platero +2
The appearance of topological effects in systems exhibiting a non-trivial topological band structure strongly relies on the coherent wave nature of the equations of motion. Here, w…
Topological instabilities in ac-driven bosonic systems
G. Engelhardt, M. Benito, G. Platero +1
Under non-equilibrium conditions, bosonic modes can become dynamically unstable with an exponentially growing occupation. On the other hand, topological band structures give rise t…
Critical quasienergy states in driven many-body systems
Victor Manuel Bastidas, Georg Engelhardt, Pedro Perez-Fernandez +2
We discuss singularities in the spectrum of driven many-body spin systems. In contrast to undriven models, the driving allows us to control the geometry of the quasienergy landscap…
AC-driven Quantum Phase Transition in the Lipkin-Meshkov-Glick Model
G. Engelhardt, V. M. Bastidas, C. Emary +1
We establish a set of nonequilibrium quantum phase transitions in the Lipkin-Meshkov-Glick model under monochromatic modulation of the inter-particle interaction. We show that the…