Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum criticality and universal scaling of a quantum antiferromagnet   Quantum effects dominate the behaviour of many diverse materials. Of
particular current interest are those systems in the vicinity of a quantum
critical point (QCP). Their physical properties are predicted to reflect those
of the nearby QCP with universal features independent of the microscopic
details. The prototypical QCP is the Luttinger liquid (LL) which is of
relevance to many quasi-one-dimensional materials. The magnetic material KCuF3
realizes an array of weakly-coupled spin chains (or LLs) and thus lies close to
but not exactly at the Luttinger liquid quantum critical point. By using
inelastic neutron scattering we have collected a complete data set of the
magnetic correlations of KCuF3 as a function of momentum, energy, and
temperature. The LL description is found to be valid over an extensive range of
these parameters, and departures from this behaviour at high and low energies
and temperatures have been identified and explained.

28
The categories of this paper are: alg-geom
24
The categories of this paper are: dg-ga
0
The categories of this paper are: hep-ph
10
The categories of this paper are: q-bio
1
The categories of this paper are: cs
36
The categories of this paper are: cmp-lg
16
The categories of this paper are: stat
22
The categories of this paper are: chao-dyn
3
The categories of this paper are: physics
21
The categories of this paper are: adap-org
11
The categories of this paper are: hep-lat
32
The categories of this paper are: atom-ph
14
The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th
6
The categories of this paper are: astro-ph
19
The categories of this paper are: eess