Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Two-dimensional exciton-polariton interactions beyond the Born
  approximation   We provide a many-body theory for the interactions of two-dimensional
excitons and polaritons beyond the Born approximation. Taking into account
Gaussian quantum fluctuations via the Bogoliubov theory, we find that the
two-body interaction strength in two-dimensions has an inverse logarithmic
dependence on the scattering length and ground state energy. This leads to a
vanishing exciton interaction strength in the zero-momentum limit but a finite
polariton interaction strength due to strong light-matter coupling. We also
derive the exact Tan relations for exciton-polaritons and calculate Tan's
contact coefficient. We show the polariton interaction strength and Tan's
contact both exhibit an anomalous enhancement at red photon-exciton detuning
when the scattering length is large. Our predictions may provide a
qualitatively correct guide for studies of exciton and polariton
nonlinearities, and suggest a route to achieving strongly nonlinear polariton
gases.

21
The categories of this paper are: adap-org
12
The categories of this paper are: nucl-th
34
The categories of this paper are: chem-ph
8
The categories of this paper are: hep-ex
26
The categories of this paper are: bayes-an
35
The categories of this paper are: mtrl-th
17
The categories of this paper are: q-fin
14
The categories of this paper are: math-ph
15
The categories of this paper are: nucl-ex
37
The categories of this paper are: supr-con
24
The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci
16
The categories of this paper are: stat
11
The categories of this paper are: hep-lat
20
The categories of this paper are: acc-phys
25
The categories of this paper are: patt-sol