251 citations · 437 across the 13 of their papers we have counts for
13 papers
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…
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…
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…
Cavity-Mediated Molecular Entanglement and Generation of Non-Classical States of Light
Davis M. Welakuh, Spyros Tserkis, Scott E. Smart +1
The generation and control of entanglement in a quantum mechanical system is a critical element of nearly all quantum applications. Molecular systems are a promising candidate, wit…
Many-Body Excited States with a Contracted Quantum Eigensolver
Scott E. Smart, Davis M. Welakuh, Prineha Narang
Calculating ground and excited states is an exciting prospect for near-term quantum computing applications, and accurate and efficient algorithms are needed to assess viable direct…
Tunable Nonlinearity and Efficient Harmonic Generation from a Strongly Coupled Light-Matter System
Davis M. Welakuh, Prineha Narang
Strong light-matter coupling within electromagnetic environments provides a promising path to modify and control chemical and physical processes. The origin of the enhancement of n…
Nonlinear optical processes in centrosymmetric systems by strong-coupling-induced symmetry breaking
Davis M. Welakuh, Prineha Narang
Nonlinear optical processes associated with even-order nonlinear susceptibilities are critical for both classical and quantum technologies. Inversion symmetry, however, prevents no…
Frequency-dependent Sternheimer linear-response formalism for strongly coupled light-matter systems
Davis M. Welakuh, Johannes Flick, Michael Ruggenthaler +2
The rapid progress in quantum-optical experiments especially in the field of cavity quantum electrodynamics and nanoplasmonics, allows to substantially modify and control chemical…
Transition from Lorentz to Fano Spectral Line Shapes in Non-Relativistic Quantum Electrodynamics
Davis M. Welakuh, Prineha Narang
Spectroscopic signatures associated with symmetric Lorentzian and asymmetric Fano line shapes are ubiquitous. Distinct features of Fano resonances in contrast with conventional sym…
Down-conversion processes in ab-initio non-relativistic quantum electrodynamics
Davis M. Welakuh, Michael Ruggenthaler, Mary-Leena M. Tchenkoue +2
The availability of efficient photon sources with specific properties is important for quantum-technological applications. However, the realization of such photon sources is often…
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…
Light-Matter Response in Non-Relativistic Quantum Electrodynamics: Quantum Modifications of Maxwell's Equations
Johannes Flick, Davis M. Welakuh, Michael Ruggenthaler +2
We derive the full linear-response theory for non-relativistic quantum electrodynamics in the long wavelength limit, show quantum modifications of the well-known Maxwell's equation…
Storage and retrieval of time-entangled soliton trains in a three-level atom system coupled to an optical cavity
Davis D. M. Welakuh, Alain M. Dikande
The storage and subsequent retrieval of coherent pulse trains in the quantum memory (i.e. cavity-dark state) of three-level atoms, are considered for an optical medium in which…