Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Bright and Dark States of Light: The Quantum Origin of Classical
  Interference   According to classical theory, the combined effect of several electromagnetic
fields is described under the generic term of interference, where intensity
patterns with maxima and minima emerge over space. On the other hand, quantum
theory asserts that considering only the expectation value of the total field
is insufficient to describe light-matter coupling, and the most widespread
explanation highlights the role of quantum fluctuations to obtain correct
predictions. We here connect the two worlds by showing that classical
interference can be quantum-mechanically interpreted as a bosonic form of
super- and subradiance, giving rise to bright and dark states for light modes.
We revisit the double-slit experiment and the Mach-Zehnder interferometer,
reinterpreting their predictions in terms of collective states of the radiation
field. We also demonstrate that quantum fluctuations are not the key ingredient
in describing the light-matter quantum dynamics when several vacuum modes are
involved. In light of our approach, the unambiguous criterion for the coupling
to occur is the presence of non-dark states when decomposing the collective
state of light. We discuss how the results here discussed could be verified in
trapped ion systems or in cross-cavity setups. Finally, we show how the bosonic
bright and dark states can be employed to implement quantum gates, which paves
the way for the engineering of multimode schemes for universal quantum
computing.

28
The categories of this paper are: alg-geom
4
The categories of this paper are: cond-mat
35
The categories of this paper are: mtrl-th
29
The categories of this paper are: funct-an
9
The categories of this paper are: nlin
7
The categories of this paper are: hep-th
21
The categories of this paper are: adap-org
10
The categories of this paper are: q-bio
26
The categories of this paper are: bayes-an
25
The categories of this paper are: patt-sol
6
The categories of this paper are: astro-ph
37
The categories of this paper are: supr-con
24
The categories of this paper are: dg-ga
5
The categories of this paper are: gr-qc
16
The categories of this paper are: stat
11
The categories of this paper are: hep-lat