Corpus ID: 219708322

The Free Electron Gas in Cavity Quantum Electrodynamics

@article{Rokaj2020TheFE,
  title={The Free Electron Gas in Cavity Quantum Electrodynamics},
  author={Vasil Rokaj and Michael Ruggenthaler and F. G. Eich and {\'A}ngel Rubio},
  journal={arXiv: Quantum Physics},
  year={2020}
}
Cavity mediated modification of material properties and phenomena is a novel research field largely motivated by the experimental advances in strong light-matter interactions. Despite this progress, exact solutions for extended systems strongly coupled to the photon field are not available, and both theory and experiments rely mainly on finite-system models. Therefore a paradigmatic example of an exactly solvable extended system in a cavity becomes highly desireable. To fill this gap we revisit… Expand
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References

SHOWING 1-10 OF 232 REFERENCES
Cavity quantum electrodynamics with many-body states of a two-dimensional electron gas
TLDR
It is shown that self-organized electronic states can be controlled and manipulated to unravel the details of the exotic electronic behavior of nonequilibrium quasiparticles with a photonic component. Expand
Dipolar quantum electrodynamics of the two-dimensional electron gas
Similarly to a previous work on the homogeneous electron gas [Y. Todorov, Phys. Rev. B 89, 075115 (2014)], we apply the Power-Zienau-Wooley (PZW) formulation of the quantum electrodynamics to theExpand
Atoms and molecules in cavities, from weak to strong coupling in quantum-electrodynamics (QED) chemistry
TLDR
This work provides an overview of how well-established concepts in the fields of quantum chemistry and material sciences have to be adapted when the quantum nature of light becomes important in correlated matter–photon problems and which effects can be anticipated. Expand
From a quantum-electrodynamical light–matter description to novel spectroscopies
Insights from spectroscopic experiments led to the development of quantum mechanics as the common theoretical framework for describing the physical and chemical properties of atoms, molecules andExpand
Light–Matter Response in Nonrelativistic Quantum Electrodynamics
TLDR
The presented framework leads to a shift in paradigm by highlighting how electronically excited states arise as a modification of the photon field and that experimentally observed effects are always due to a complex interplay between light and matter. Expand
Cavity quantum-electrodynamical polaritonically enhanced electron-phonon coupling and its influence on superconductivity
TLDR
It is found that through highly polarizable dipolar phonons, large cavity-enhanced electron-phonon couplings are possible, but superconductivity is not enhanced for the forward-scattering pairing mechanism due to the interplay between coupling enhancement and mode softening. Expand
Ultrastrong Coupling of the Cyclotron Transition of a 2D Electron Gas to a THz Metamaterial
TLDR
Experiments show ultrastrong light-matter coupling in a terahertz (THz) metamaterial where the cyclotron transition of a high-mobility two-dimensional electron gas (2DEG) is coupled to the photonic modes of an array of electronic split-ring resonators. Expand
Dressed-Orbital Approach to Cavity Quantum Electrodynamics and Beyond
We present a novel representation of coupled matter-photon systems that allows the application of many-body methods developed for purely fermionic systems. We do so by rewriting the original coupledExpand
Cavity quantum electrodynamics of strongly correlated electron systems: A no-go theorem for photon condensation
In spite of decades of work it has remained unclear whether or not superradiant quantum phases, referred to here as photon condensates, can occur in equilibrium. In this Letter, we first show thatExpand
Cavity Control of Excitons in Two-Dimensional Materials
TLDR
A robust and efficient way of controlling the optical spectra of two-dimensional materials and van der Waals heterostructures by quantum cavity embedding by solving the coupled electron–photon Schrödinger equation in a quantum-electrodynamical extension of the Bethe-Salpeter approach is proposed. Expand
...
1
2
3
4
5
...