Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Atom gravimeters and gravitational redshift   In a recent paper, H. Mueller, A. Peters and S. Chu [A precision measurement
of the gravitational redshift by the interference of matter waves, Nature 463,
926-929 (2010)] argued that atom interferometry experiments published a decade
ago did in fact measure the gravitational redshift on the quantum clock
operating at the very high Compton frequency associated with the rest mass of
the Caesium atom. In the present Communication we show that this interpretation
is incorrect.

12
The categories of this paper are: nucl-th
20
The categories of this paper are: acc-phys
4
The categories of this paper are: cond-mat
28
The categories of this paper are: alg-geom
9
The categories of this paper are: nlin
17
The categories of this paper are: q-fin
37
The categories of this paper are: supr-con
10
The categories of this paper are: q-bio
11
The categories of this paper are: hep-lat
7
The categories of this paper are: hep-th
23
The categories of this paper are: solv-int
32
The categories of this paper are: atom-ph
16
The categories of this paper are: stat
34
The categories of this paper are: chem-ph
0
The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th