Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Optical levitation of high purity nanodiamonds in vacuum without heating   Levitated nanodiamonds containing nitrogen vacancy centres in high vacuum are
a potential test bed for numerous phenomena in fundamental physics. However,
experiments so far have been limited to low vacuum due to heating arising from
optical absorption of the trapping laser. We show that milling pure diamond
creates nanodiamonds that do not heat up as the optical intensity is raised
above 700 GW/m$^2$ below 5 mbar of pressure. This advance now means that the
level of attainable vacuum for nanodiamonds in optical dipole traps is no
longer temperature limited.

31
The categories of this paper are: ao-sci
1
The categories of this paper are: cs
22
The categories of this paper are: chao-dyn
26
The categories of this paper are: bayes-an
35
The categories of this paper are: mtrl-th
16
The categories of this paper are: stat
15
The categories of this paper are: nucl-ex
27
The categories of this paper are: comp-gas
8
The categories of this paper are: hep-ex
11
The categories of this paper are: hep-lat
28
The categories of this paper are: alg-geom
23
The categories of this paper are: solv-int
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The categories of this paper are: funct-an
17
The categories of this paper are: q-fin
19
The categories of this paper are: eess
34
The categories of this paper are: chem-ph