251 citations · 530 across the 20 of their papers we have counts for
23 papers
Chiral Vacuum Engineering of Quantum Hall Matter
Kiran M. Kulkarni, Andrey Baydin, Motoaki Bamba +3
We reveal that a chiral cavity distinguishes the resonant and antiresonant interactions between a two-dimensional electron gas and the cavity vacuum. For co-rotating helicities, 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…
Collective rotational cat states of molecules in microwave cavities
Volker Karle, Florian Kluibenschedl, Mikhail Lemeshko +1
We show theoretically that an ensemble of polar molecules coupled to a microwave cavity supports hybrid rotational-photonic cat states. The cavity couples to a symmetric rotor in t…
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…
Hybrid light-matter boundaries of graphene in a chiral cavity
Volker Karle, Oriana K. Diessel, Vasil Rokaj +1
Recent advances in chiral cavities that can couple coherently to two-dimensional materials have opened a powerful route to reshape electronic topology without an external drive. He…
Realization of a Chiral Photonic-Crystal Cavity with Broken Time-Reversal Symmetry
Kiran M. Kulkarni, Hongjing Xu, Fuyang Tay +7
Light-matter interactions in chiral cavities offer a compelling route to manipulate material properties by breaking fundamental symmetries such as time-reversal symmetry. However,…
Cavity-Mediated Collective Resonant Suppression of Local Molecular Vibrations
Vasil Rokaj, Ilia Tutunnikov, H. R. Sadeghpour
Recent advances in polaritonic chemistry suggest that chemical reactions can be controlled via collective vibrational strong coupling (VSC) in a cavity. In this fully analytical wo…
Dynamical generation and transfer of nonclassical states in strongly interacting light-matter systems in cavities
Ilia Tutunnikov, Vasil Rokaj, Jianshu Cao +1
We propose leveraging strong and ultrastrong light-matter coupling to efficiently generate and exchange nonclassical light and quantum matter states. Two initial conditions are con…
Terahertz chiral photonic-crystal cavities for Dirac gap engineering in graphene
Fuyang Tay, Stephen Sanders, Andrey Baydin +6
Strong coupling between matter and vacuum electromagnetic fields in a cavity can induce novel quantum phases in thermal equilibrium via symmetry breaking. Particularly intriguing i…
Multiphoton dressed Rydberg excitations in a microwave cavity with ultracold Rb atoms
J. D. Massayuki Kondo, Seth T. Rittenhouse, Daniel Varela Magalhaes +4
We investigate magneto-optical trap loss spectroscopy of Rydberg excited Rb () atoms, placed inside a tailored microwave cavity. The cavity frequen…
Cavity Induced Topology in Graphene
Ceren B. Dag, Vasil Rokaj
Strongly coupling materials to cavity fields can affect their electronic properties altering the phases of matter. We study the monolayer graphene whose electrons are coupled to bo…
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…
Polaritonic ultracold reactions: cavity controlled molecular photoassociation
Vasil Rokaj, Simeon I. Mistakidis, H. R. Sadeghpour
We introduce a prototypical model for cavity polaritonic control of ultracold photochemistry by considering the resonant vibrational strong coupling of a rubidium dimer to a terahe…
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…
Weakened Topological Protection of the Quantum Hall Effect in a Cavity
Vasil Rokaj, Jie Wang, John Sous +3
We study the quantum Hall effect in a two-dimensional homogeneous electron gas coupled to a quantum cavity field. As initially pointed out by Kohn, Galilean invariance for a homoge…
Cavity Induced Collective Behavior in the Polaritonic Ground State
V. Rokaj, S. I. Mistakidis, H. R. Sadeghpour
Cavity quantum electrodynamics provides an ideal platform to engineer and control light-matter interactions with polariton quasiparticles. In this work, we investigate collective p…
Condensed Matter Systems in Cavity Quantum Electrodynamics
Vasil Rokaj
Condensed matter physics and quantum electrodynamics (QED) have been long considered as distinct disciplines. This situation is changing by the progress in cavity QED materials. Mo…
New Class of Landau Levels and Hall Phases in a 2D Electron Gas Subject to an Inhomogeneous Magnetic Field: An Analytic Solution
Dominik Sidler, Vasil Rokaj, Michael Ruggenthaler +1
An analytic closed form solution is derived for the bound states of electrons subject to a static, inhomogeneous (-decaying) magnetic field, including the Zeeman interaction.…
Polaritonic Hofstadter Butterfly and Cavity-Control of the Quantized Hall Conductance
Vasil Rokaj, Markus Penz, Michael A. Sentef +2
In a previous work [Phys. Rev. Lett. 123, 047202 (2019)] a translationally invariant framework called quantum-electrodynamical Bloch (QED-Bloch) theory was introduced for the descr…
The Free Electron Gas in Cavity Quantum Electrodynamics
Vasil Rokaj, Michael Ruggenthaler, Florian G. Eich +1
Cavity modification of material properties and phenomena is a novel research field largely motivated by the advances in strong light-matter interactions. Despite this progress, exa…
Relevance of the quadratic diamagnetic and self-polarization terms in cavity quantum electrodynamics
Christian Schäfer, Michael Ruggenthaler, Vasil Rokaj +1
Experiments at the interface of quantum-optics and chemistry have revealed that strong coupling between light and matter can substantially modify chemical and physical properties o…
Quantum Electrodynamical Bloch Theory with Homogeneous Magnetic Fields
Vasil Rokaj, Markus Penz, Michael A Sentef +2
We propose a solution to the problem of Bloch electrons in a homogeneous magnetic field by including the quantum fluctuations of the photon field. A generalized quantum electrodyna…
Light-matter interaction in the long-wavelength limit: no ground-state without dipole self-energy
Vasil Rokaj, Davis M. Welakuh, Michael Ruggenthaler +1
Most theoretical studies for correlated light-matter systems are performed within the long-wavelength limit, i.e., the electromagnetic field is assumed to be spatially uniform. In…