Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Decoherence of anomalously-fluctuating states of finite macroscopic
  systems   In quantum systems of a macroscopic size V, such as interacting many
particles and quantum computers with many qubits, there exist pure states such
that fluctuations of some intensive operator A is anomalously large, <\delta
A^2> = O(V^0), which is much larger than that assumed in thermodynamics,
<\delta A^2> = O(1/V). By making full use of the locality, we show, starting
from Hamiltonians of macroscopic degrees of freedom, that such states decohere
at anomalously fast rates when they are weakly perturbed from environments.

6
The categories of this paper are: astro-ph
36
The categories of this paper are: cmp-lg
19
The categories of this paper are: eess
28
The categories of this paper are: alg-geom
7
The categories of this paper are: hep-th
33
The categories of this paper are: plasm-ph
37
The categories of this paper are: supr-con
10
The categories of this paper are: q-bio
4
The categories of this paper are: cond-mat
2
The categories of this paper are: math
14
The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th
1
The categories of this paper are: cs
25
The categories of this paper are: patt-sol
26
The categories of this paper are: bayes-an
8
The categories of this paper are: hep-ex