Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cavity Field Reconstruction at Finite Temperature   We present a scheme to reconstruct the quantum state of a field prepared
inside a lossy cavity at finite temperature. Quantum coherences are normally
destroyed by the interaction with an environment, but we show that it is
possible to recover complete information about the initial state (before
interaction with its environment), making possible to reconstruct any
$s$-parametrized quasiprobability distribution, in particular, the Wigner
function.

14
The categories of this paper are: math-ph
3
The categories of this paper are: physics
37
The categories of this paper are: supr-con
24
The categories of this paper are: dg-ga
28
The categories of this paper are: alg-geom
15
The categories of this paper are: nucl-ex
23
The categories of this paper are: solv-int
26
The categories of this paper are: bayes-an
9
The categories of this paper are: nlin
35
The categories of this paper are: mtrl-th
12
The categories of this paper are: nucl-th
19
The categories of this paper are: eess
6
The categories of this paper are: astro-ph
33
The categories of this paper are: plasm-ph
25
The categories of this paper are: patt-sol
17
The categories of this paper are: q-fin