Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Absolute Single Ion Thermometry   We describe and experimentally implement a single-ion local thermometry
technique with absolute sensitivity adaptable to all laser-cooled atomic ion
species. The technique is based on the velocity-dependent spectral shape of a
quasi-dark resonance tailored in a J $\rightarrow$ J transition such that the
two driving fields can be derived from the same laser source leading to a
negligible relative phase shift. We validated the method and tested its
performances in an experiment on a single 88 Sr + ion cooled in a surface
radio-frequency trap. We first applied the technique to characterise the
heating-rate of the surface trap. We then measured the stationary temperature
of the ion as a function of cooling laser detuning in the Doppler regime. The
results agree with theoretical calculations, with an absolute error smaller
than 100 $\mu$K at 500 $\mu$K, in a temperature range between 0.5 and 3 mK and
in the absence of adjustable parameters. This simple-to-implement and reliable
method opens the way to fast absolute measurements of single-ion temperatures
in future experiments dealing with heat transport in ion chains or
thermodynamics at the single-ion level.

29
The categories of this paper are: funct-an
24
The categories of this paper are: dg-ga
34
The categories of this paper are: chem-ph
36
The categories of this paper are: cmp-lg
15
The categories of this paper are: nucl-ex
33
The categories of this paper are: plasm-ph
22
The categories of this paper are: chao-dyn
12
The categories of this paper are: nucl-th
21
The categories of this paper are: adap-org
4
The categories of this paper are: cond-mat
9
The categories of this paper are: nlin
1
The categories of this paper are: cs
8
The categories of this paper are: hep-ex
18
The categories of this paper are: econ
27
The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci