22 citations · 50 across the 19 of their papers we have counts for
21 papers
Quantum electrodynamics of equilibrium systems: A rigorous Maxwell-regularized functional-theoretic formulation
Markus Penz, Christian Jöns, Michael Ruggenthaler +1
A framework for quantum electrodynamics of equilibrium systems is proposed that takes the Maxwell equations as foundational and links them to the structure of density-functional th…
Robustness of quantized Hall resistivity under cavity coupling at zero temperature
Juan Román-Roche, Jie Wang, Michael Ruggenthaler +2
Recent experiments have shown that strong light-matter coupling in electromagnetic cavities can modify transport properties of quantum Hall systems through the formation of Landau…
Cavity-mediated localization and collective electron correlation phases
Dominik Sidler, Francesco Greco, Michael Ruggenthaler +1
Collective strong coupling of molecular ensembles to optical cavities opens a route to modifying matter through genuinely collective electronic correlations. Yet even in the absenc…
Linear and nonlinear vibrational excitation driven by molecular polaritons
Wenxiang Ying, Carlos M. Bustamante, Franco P. Bonafé +5
Following our recent numerical study [arXiv:2601.16299 (2026)], we investigate vibrational excitation induced by transient optical driving in molecular ensembles strongly coupled t…
Unified ab initio quantum-electrodynamical density-functional theory for cavity-modified electron-phonon-photon coupling in solids
Benshu Fan, I-Te Lu, Michael Ruggenthaler +1
Quantum-electrodynamical density-functional theory (QEDFT) provides a first-principles framework for describing materials coupled to quantized electromagnetic fields. While QEDFT h…
Collective Rabi-driven vibrational activation in molecular polaritons
Carlos M. Bustamante, Franco P. Bonafé, Richard Richardson +5
Molecular polaritons arise from electronic or vibrational strong coupling (ESC and VSC) with confined electromagnetic fields. While these have been widely studied, the influence of…
Testing electron-photon exchange-correlation functional performance for many-electron systems under weak and strong light-matter coupling
Iman Ahmadabadi, I-Te Lu, Leonardo A. Cunha +3
We present results of a photon-free exchange-correlation functional within the local density approximation (pxcLDA) for quantum electrodynamics density functional theory (QEDFT) th…
Multimode equilibrium approximations in light-matter systems from weak to strong coupling
Davis M. Welakuh, Vasil Rokaj, Michael Ruggenthaler +1
In this work, we detail different approaches to treat multi-mode photonic environments within non-relativistic quantum electrodynamics in the long-wavelength approximation efficien…
Molecular polariton dynamics in realistic cavities
Carlos M. Bustamante, Franco P. Bonafé, Maxim Sukharev +3
The large number of degrees of freedom involved in polaritonic chemistry processes considerably restricts the systems that can be described by any ab initio approach, due to the re…
Density-Functional Tight Binding Meets Maxwell: Unraveling the Mysteries of (Strong) Light-Matter Coupling Efficiently
Dominik Sidler, Carlos M. Bustamante, Franco P. Bonafe +3
Controlling chemical and material properties through strong light-matter coupling in optical cavities has gained considerable attention over the past decade. However, the underlyin…
Surface-mediated ultra-strong cavity coupling of two-dimensional itinerant electrons
Christian J. Eckhardt, Andrey Grankin, Dante M. Kennes +5
Engineering phases of matter in cavities requires effective light-matter coupling strengths that are on the same order of magnitude as the bare system energetics, coined the ultra-…
Collectively-modified inter-molecular electron correlations: The connection of polaritonic chemistry and spin glass physics
Dominik Sidler, Michael Ruggenthaler, Angel Rubio
Polaritonic chemistry has garnered increasing attention in recent years due to pioneering experimental results, which show that site- and bond-selective chemistry at room temperatu…
The relevance of degenerate states in chiral polaritonics
Carlos M. Bustamante, Dominik Sidler, Michael Ruggenthaler +1
In this work we explore theoretically whether a parity-violating/chiral light-matter interaction is required to capture all relevant aspects of chiral polaritonics or if a parity-c…
Relativistic Linear Response in Quantum-Electrodynamical Density Functional Theory
Lukas Konecny, Valeriia P. Kosheleva, Heiko Appel +2
We present the theoretical derivation and numerical implementation of the linear response equations for relativistic quantum electrodynamical density functional theory (QEDFT). In…
Cavity engineered phonon-mediated superconductivity in MgB from first principles quantum electrodynamics
I-Te Lu, Dongbin Shin, Mark Kamper Svendsen +5
Strong laser pulses can control superconductivity, inducing non-equilibrium transient pairing by leveraging strong-light matter interaction. Here we demonstrate theoretically that…
Electron-Photon Exchange-Correlation Approximation for QEDFT
I-Te Lu, Michael Ruggenthaler, Nicolas Tancogne-Dejean +3
Quantum-electrodynamical density-functional theory (QEDFT) provides a promising avenue for exploring complex light-matter interactions in optical cavities for real materials. Simil…
Analytic Model Reveals Local Molecular Polarizability Changes Induced by Collective Strong Coupling in Optical Cavities
Jacob Horak, Dominik Sidler, Thomas Schnappinger +3
Despite recent numerical evidence, one of the fundamental theoretical mysteries of polaritonic chemistry is how and if collective strong coupling can induce local changes of the el…
Effective Equilibrium Theory of Quantum Light-Matter Interaction in Cavities: Extended Systems and the Long Wavelength Approximation
Mark Kamper Svendsen, Michael Ruggenthaler, Hannes Hübener +4
When light and matter interact strongly, the resulting hybrid system inherits properties from both constituents, allowing one to modify material behavior by engineering the surroun…
Testing the Renormalization of the von Klitzing Constant by Cavity Vacuum Fields
Josefine Enkner, Lorenzo Graziotto, Felice Appugliese +7
In light of recent developments demonstrating the impact of cavity vacuum fields inducing the breakdown of topological protection in the integer quantum Hall effect, a compelling q…
Exchange-only virial relation from the adiabatic connection
Andre Laestadius, Mihály A. Csirik, Markus Penz +4
The exchange-only virial relation due to Levy and Perdew is revisited. Invoking the adiabatic connection, we introduce the exchange energy in terms of the right-derivative of the u…
Non-perturbative Mass Renormalization Effects in Non-relativistic Quantum Electrodynamics
Davis M. Welakuh, Vasil Rokaj, Michael Ruggenthaler +1
In this work we investigate the effects that multi-mode photonic environments, e.g., optical cavities, have on the properties of quantum matter. We highlight the importance of the…