Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Camera-limits for wide-field magnetic resonance imaging of a
  nitrogen-vacancy spin sensor   Sensitive, real-time optical magnetometry with nitrogen-vacancy centers in
diamond relies on accurate imaging of small ($\ll 10^{-2}$) fractional
fluorescence changes across the diamond sample. We discuss the limitations on
magnetic-field sensitivity resulting from the limited number of photoelectrons
that a camera can record in a given time. Several types of camera sensors are
analyzed and the smallest measurable magnetic-field change is estimated for
each type. We show that most common sensors are of a limited use in such
applications, while certain highly specific cameras allow to achieve
nanotesla-level sensitivity in $1$~s of a combined exposure. Finally, we
demonstrate the results obtained with a lock-in camera that pave the way for
real-time, wide-field magnetometry at the nanotesla level and with micrometer
resolution.

18
The categories of this paper are: econ
35
The categories of this paper are: mtrl-th
25
The categories of this paper are: patt-sol
31
The categories of this paper are: ao-sci
30
The categories of this paper are: q-alg
0
The categories of this paper are: hep-ph
28
The categories of this paper are: alg-geom
12
The categories of this paper are: nucl-th
29
The categories of this paper are: funct-an
6
The categories of this paper are: astro-ph
19
The categories of this paper are: eess
7
The categories of this paper are: hep-th
24
The categories of this paper are: dg-ga
2
The categories of this paper are: math
11
The categories of this paper are: hep-lat
36
The categories of this paper are: cmp-lg