Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Twin Quantum Cheshire Photons   In an experiment with both pre- and post-selection one can find a photon (the
cat) in one place and its polarization (the smile) in another. Aharonov et al.
asked recently whether more than two degrees of freedom could be separated in
the same way. We show that this is possible and that the separation of
properties from objects that carry them is in some situations even stronger.

19
The categories of this paper are: eess
23
The categories of this paper are: solv-int
14
The categories of this paper are: math-ph
29
The categories of this paper are: funct-an
32
The categories of this paper are: atom-ph
3
The categories of this paper are: physics
11
The categories of this paper are: hep-lat
16
The categories of this paper are: stat
34
The categories of this paper are: chem-ph
4
The categories of this paper are: cond-mat
27
The categories of this paper are: comp-gas
7
The categories of this paper are: hep-th
31
The categories of this paper are: ao-sci
25
The categories of this paper are: patt-sol
10
The categories of this paper are: q-bio
17
The categories of this paper are: q-fin