Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: New classes of systematic effects in gas spin co-magnetometers   Atomic co-magnetometers are widely used in precision measurements searching
for spin interactions beyond the Standard Model. We describe a new
$^3$He-$^{129}$Xe co-magnetometer probed by Rb atoms and use it to identify two
general classes of systematic effects in gas co-magnetometers, one associated
with diffusion in second-order magnetic field gradients and another due to
temperature gradients. We also develop a general and practical approach for
calculating spin relaxation and frequency shifts due to arbitrary magnetic
field gradients and confirm it experimentally.

18
The categories of this paper are: econ
28
The categories of this paper are: alg-geom
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
1
The categories of this paper are: cs
33
The categories of this paper are: plasm-ph
15
The categories of this paper are: nucl-ex
6
The categories of this paper are: astro-ph
24
The categories of this paper are: dg-ga
35
The categories of this paper are: mtrl-th
29
The categories of this paper are: funct-an
10
The categories of this paper are: q-bio
2
The categories of this paper are: math
13
The categories of this paper are: quant-ph
20
The categories of this paper are: acc-phys
22
The categories of this paper are: chao-dyn