Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A trapped atom interferometer with ultracold Sr atoms   We report on a trapped atom interferometer based on Bragg diffraction and
Bloch oscillations with alkaline-earth-metal atoms. We use a Ramsey-Bord\'e
Bragg interferometer with $^{88}$Sr atoms combined with Bloch oscillations to
extend the interferometer time. Thanks to a long coherence time for Bloch
oscillations of $^{88}$Sr atoms, we observed interference up to 1 s evolution
time in the lattice. A detailed study of decoherence sources during the Bloch
phase is also presented. While still limited in sensitivity by lattice lifetime
and beam inhomogeneity this result opens the way to high contrast trapped
interferometers with extended interrogation time.

19
The categories of this paper are: eess
26
The categories of this paper are: bayes-an
34
The categories of this paper are: chem-ph
17
The categories of this paper are: q-fin
8
The categories of this paper are: hep-ex
4
The categories of this paper are: cond-mat
10
The categories of this paper are: q-bio
29
The categories of this paper are: funct-an
14
The categories of this paper are: math-ph
13
The categories of this paper are: quant-ph
16
The categories of this paper are: stat
0
The categories of this paper are: hep-ph
11
The categories of this paper are: hep-lat
28
The categories of this paper are: alg-geom
20
The categories of this paper are: acc-phys
37
The categories of this paper are: supr-con