Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Temperature-dependence of T1 spin relaxation of single NV centers in
  nanodiamonds   We report the experimental study of the temperature-dependence of the
longitudinal spin relaxation time $T_1$ of single Nitrogen-Vacancy (NV) centers
hosted in nanodiamonds. To determine the relaxation mechanisms at stake,
measurements of the $T_1$ relaxation time are performed for a set of individual
NV centers both at room and cryogenic temperatures. The results are consistant
with a temperature-dependent relaxation process which is attributed to a
thermally-activated magnetic noise produced by paramagnetic impurities lying on
the nanodiamond surface. These results confirm the existence of surface-induced
spin relaxation processes occurring in nanodiamonds, which are relevant for
future developments of sensitive nanoscale NV-based quantum sensors.

32
The categories of this paper are: atom-ph
27
The categories of this paper are: comp-gas
28
The categories of this paper are: alg-geom
19
The categories of this paper are: eess
26
The categories of this paper are: bayes-an
18
The categories of this paper are: econ
13
The categories of this paper are: quant-ph
9
The categories of this paper are: nlin
17
The categories of this paper are: q-fin
33
The categories of this paper are: plasm-ph
34
The categories of this paper are: chem-ph
36
The categories of this paper are: cmp-lg
2
The categories of this paper are: math
14
The categories of this paper are: math-ph
11
The categories of this paper are: hep-lat
7
The categories of this paper are: hep-th