Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum theory of a strongly-dissipative scalar field   The properties of a quantum dissipative scalar field is analyzed by
Caldeira-Leggett model in strong-coupling regime. The Lagrangian of the total
system is canonically quantized and the full Hamiltonian is diagonalized using
Fano technique. A mode-dependent probability density is introduced. The steady
state energy and correlation functions at finite temperature are calculated in
terms of the probability density.

36
The categories of this paper are: cmp-lg
6
The categories of this paper are: astro-ph
4
The categories of this paper are: cond-mat
27
The categories of this paper are: comp-gas
23
The categories of this paper are: solv-int
5
The categories of this paper are: gr-qc
17
The categories of this paper are: q-fin
10
The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph
22
The categories of this paper are: chao-dyn
37
The categories of this paper are: supr-con
20
The categories of this paper are: acc-phys
34
The categories of this paper are: chem-ph
0
The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph