Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Pair-excitation energetics of highly correlated many-body states   A microscopic approach is developed to determine the excitation energetics of
highly correlated quasi-particles in optically excited semiconductors based
entirely on a pair-correlation function input. For this purpose, the Wannier
equation is generalized to compute the energy per excited electron-hole pair of
a many-body state probed by a weak pair excitation. The scheme is verified for
the degenerate Fermi gas and incoherent excitons. In a certain range of
experimentally accessible parameters, a new stable quasi-particle state is
predicted which consists of four to six electron-hole pairs forming a liquid
droplet of fixed radius. The energetics and pair-correlation features of these
"quantum droplets" are analyzed.

7
The categories of this paper are: hep-th
2
The categories of this paper are: math
35
The categories of this paper are: mtrl-th
13
The categories of this paper are: quant-ph
15
The categories of this paper are: nucl-ex
28
The categories of this paper are: alg-geom
16
The categories of this paper are: stat
32
The categories of this paper are: atom-ph
37
The categories of this paper are: supr-con
20
The categories of this paper are: acc-phys
33
The categories of this paper are: plasm-ph
30
The categories of this paper are: q-alg
9
The categories of this paper are: nlin
12
The categories of this paper are: nucl-th
8
The categories of this paper are: hep-ex
0
The categories of this paper are: hep-ph