Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cavity control of Excitons in two dimensional Materials   We propose a robust and efficient way of controlling the optical spectra of
two-dimensional materials and van der Waals heterostructures by quantum cavity
embedding. The cavity light-matter coupling leads to the formation of
exciton-polaritons, a superposition of photons and excitons. Our first
principles study demonstrates a reordering and mixing of bright and dark
excitons spectral features and in the case of a type II van-der-Waals
heterostructure an inversion of intra and interlayer excitonic resonances. We
further show that the cavity light-matter coupling strongly depends on the
dielectric environment and can be controlled by encapsulating the active 2D
crystal in another dielectric material. Our theoretical calculations are based
on a newly developed non-perturbative many-body framework to solve the coupled
electron-photon Schr\"odinger equation in a quantum-electrodynamical extension
of the Bethe-Salpeter approach. This approach enables the ab-initio simulations
of exciton-polariton states and their dispersion from weak to strong cavity
light-matter coupling regimes. Our method is then extended to treat van der
Waals heterostructures and encapsulated 2D materials using a simplified
Mott-Wannier description of the excitons that can be applied to very large
systems beyond reach for fully ab-initio approaches.

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The categories of this paper are: mtrl-th
9
The categories of this paper are: nlin
1
The categories of this paper are: cs
5
The categories of this paper are: gr-qc
13
The categories of this paper are: quant-ph
8
The categories of this paper are: hep-ex
12
The categories of this paper are: nucl-th
15
The categories of this paper are: nucl-ex
30
The categories of this paper are: q-alg
32
The categories of this paper are: atom-ph
7
The categories of this paper are: hep-th
22
The categories of this paper are: chao-dyn
24
The categories of this paper are: dg-ga
11
The categories of this paper are: hep-lat
33
The categories of this paper are: plasm-ph
0
The categories of this paper are: hep-ph