Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Universal destabilization and slowing of spin transfer functions by a
  bath of spins   We investigate the effect of a spin bath on the spin transfer functions of a
permanently coupled spin system. When each spin is coupled to a seperate
environment, the effect on the transfer functions in the first excitation
sector is amazingly simple: the group velocity is slowed down by a factor of
two, and the fidelity is destabilized by a modulation of |cos Gt|, where G is
the mean square coupling to the environment.

6
The categories of this paper are: astro-ph
5
The categories of this paper are: gr-qc
8
The categories of this paper are: hep-ex
16
The categories of this paper are: stat
19
The categories of this paper are: eess
2
The categories of this paper are: math
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
37
The categories of this paper are: supr-con
1
The categories of this paper are: cs
9
The categories of this paper are: nlin
30
The categories of this paper are: q-alg
10
The categories of this paper are: q-bio
15
The categories of this paper are: nucl-ex
11
The categories of this paper are: hep-lat
0
The categories of this paper are: hep-ph