Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Measuring Quantum Coherence in Multi-Slit Interference   A quantitative measure of quantum coherence was recently introduced, in the
context of quantum information theory. This measure has also been propounded as
a good quantifier of the wave nature of quantum objects. However, actually
measuring coherence in an experiment is still considered a challenge. A
procedure for measuring coherence in a multi-slit interference is proposed
here. It can be used for experimentally testing duality relations for
interference experiments involving more than two slits.

23
The categories of this paper are: solv-int
33
The categories of this paper are: plasm-ph
30
The categories of this paper are: q-alg
19
The categories of this paper are: eess
31
The categories of this paper are: ao-sci
17
The categories of this paper are: q-fin
18
The categories of this paper are: econ
32
The categories of this paper are: atom-ph
10
The categories of this paper are: q-bio
16
The categories of this paper are: stat
11
The categories of this paper are: hep-lat
37
The categories of this paper are: supr-con
35
The categories of this paper are: mtrl-th
9
The categories of this paper are: nlin
15
The categories of this paper are: nucl-ex
34
The categories of this paper are: chem-ph