Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A time-frequency approach to relativistic correlations in quantum field
  theory   Moving detectors in relativistic quantum field theories reveal the
fundamental entangled structure of the vacuum which manifests, for instance,
through its thermal character when probed by a uniformly accelerated detector.
In this paper, we propose a general formalism inspired both from signal
processing and correlation functions of quantum optics to analyze the response
of point-like detectors following a generic, non-stationary trajectory. In this
context, the Wigner representation of the first-order correlation of the
quantum field is a natural time-frequency tool to understand single-detection
events. This framework offers a synthetic perspective on the problem of
detection in relativistic theory and allows us to analyze various
non-stationary situations (adiabatic, periodic) and how excitations and
superpositions are deformed by motion. It opens up interesting perspective on
the issue of the definition of particles.

16
The categories of this paper are: stat
37
The categories of this paper are: supr-con
11
The categories of this paper are: hep-lat
14
The categories of this paper are: math-ph
27
The categories of this paper are: comp-gas
33
The categories of this paper are: plasm-ph
32
The categories of this paper are: atom-ph
20
The categories of this paper are: acc-phys
21
The categories of this paper are: adap-org
36
The categories of this paper are: cmp-lg
3
The categories of this paper are: physics
6
The categories of this paper are: astro-ph
29
The categories of this paper are: funct-an
8
The categories of this paper are: hep-ex
23
The categories of this paper are: solv-int
18
The categories of this paper are: econ