Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Electromagnetism in terms of quantum measurements   We consider the question whether electromagnetism can be derived from quantum
physics of measurements. It turns out that this is possible, both for quantum
and classical electromagnetism, if we use more recent innovations such as
smearing of observables and simultaneous measurability. In this way we justify
the use of von Neumann-type measurement models for physical processes.
  We apply operational quantum measurement theory to gain insight in
fundamental aspects of quantum physics. Interactions of von Neumann type make
the Heisenberg evolution of observables describable using explicit operator
deformations. In this way one can obtain quantized electromagnetism as a
measurement of a system by another. The relevant deformations (Rieffel
deformations) have a mathematically well-defined "classical" limit which is
indeed classical electromagnetism for our choice of interaction.

16
The categories of this paper are: stat
29
The categories of this paper are: funct-an
8
The categories of this paper are: hep-ex
21
The categories of this paper are: adap-org
11
The categories of this paper are: hep-lat
37
The categories of this paper are: supr-con
32
The categories of this paper are: atom-ph
7
The categories of this paper are: hep-th
36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
4
The categories of this paper are: cond-mat
25
The categories of this paper are: patt-sol
17
The categories of this paper are: q-fin
18
The categories of this paper are: econ
12
The categories of this paper are: nucl-th
6
The categories of this paper are: astro-ph