27 citations · 59 across the 4 of their papers we have counts for
4 papers · 1 filter
Dynamical mean-field study of a photon-mediated ferroelectric phase transition
Katharina Lenk, Jiajun Li, Philipp Werner +1
The interplay of light and matter gives rise to intriguing cooperative effects in quantum many-body systems. This is even true in thermal equilibrium, where the electromagnetic fie…
Collective theory for an interacting solid in a single-mode cavity
Katharina Lenk, Jiajun Li, Philipp Werner +1
We investigate the control of interacting matter through strong coupling to a single electromagnetic mode, such as the photon mode in a Fabry-Perot or split-ring cavity. For this p…
Vertex-based Diagrammatic Treatment of Light-Matter-Coupled Systems
Aaram J. Kim, Katharina Lenk, Jiajun Li +2
We propose a diagrammatic Monte Carlo approach for general spin-boson models, which can be regarded as a generalization of the strong-coupling expansion for fermionic impurity mode…
Collective excitations of the U(1)-symmetric exciton insulator in a cavity
Katharina Lenk, Martin Eckstein
We investigate the equilibrium state and the collective modes of an excitonic insulator (EI) in a Fabry-Pérot cavity. In an EI, two bands of a semiconductor or semimetal spontaneou…