Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Measures of macroscopicity for quantum spin systems   We investigate the notion of "macroscopicity" in the case of large quantum
spin systems and provide two main results. First, we motivate the Fisher
information as a measure for the macroscopicity of quantum states. Second, we
compare the existing literature of this topic. We report on a hierarchy among
the measures and we conclude that one should carefully distinguish between
"macroscopic quantum states" and "macroscopic superpositions", which is a
strict subclass of the former.

31
The categories of this paper are: ao-sci
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
33
The categories of this paper are: plasm-ph
19
The categories of this paper are: eess
1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th
3
The categories of this paper are: physics
37
The categories of this paper are: supr-con
9
The categories of this paper are: nlin
5
The categories of this paper are: gr-qc
15
The categories of this paper are: nucl-ex
24
The categories of this paper are: dg-ga
10
The categories of this paper are: q-bio
34
The categories of this paper are: chem-ph