Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the interpretation of quantum theory - from Copenhagen to the present
  day   A central feature in the Copenhagen interpretation is the use of classical
concepts from the outset. Modern developments show, however, that the emergence
of classical properties can be understood within the framework of quantum
theory itself, through the process of decoherence. This fact becomes most
crucial for the interpretability of quantum cosmology - the application of
quantum theory to the Universe as a whole. I briefly review these developments
and emphasize the importance of an unbiased attitude on the interpretational
side for future progress in physics.

7
The categories of this paper are: hep-th
27
The categories of this paper are: comp-gas
11
The categories of this paper are: hep-lat
34
The categories of this paper are: chem-ph
17
The categories of this paper are: q-fin
18
The categories of this paper are: econ
35
The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci
12
The categories of this paper are: nucl-th
22
The categories of this paper are: chao-dyn
21
The categories of this paper are: adap-org
23
The categories of this paper are: solv-int
28
The categories of this paper are: alg-geom
3
The categories of this paper are: physics
10
The categories of this paper are: q-bio
8
The categories of this paper are: hep-ex