Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the testability of the equivalence principle as a gauge principle
  detecting the gravitational $t^3$ phase   There have been various claims that the Equivalence Principle, as originally
formulated by Einstein, presents several difficulties when extended to the
quantum domain, even in the regime of weak gravity. Here we point out that by
following the same approach as used for other classical principles, e.g. the
principle of conservation of energy, one can, for weak fields, obtain a
straightforward quantum formulation of the principle. We draw attention to a
recently performed test that confirms the Equivalence Principle in this form
and discuss its implications.

18
The categories of this paper are: econ
20
The categories of this paper are: acc-phys
14
The categories of this paper are: math-ph
8
The categories of this paper are: hep-ex
15
The categories of this paper are: nucl-ex
30
The categories of this paper are: q-alg
33
The categories of this paper are: plasm-ph
10
The categories of this paper are: q-bio
11
The categories of this paper are: hep-lat
12
The categories of this paper are: nucl-th
4
The categories of this paper are: cond-mat
37
The categories of this paper are: supr-con
3
The categories of this paper are: physics
21
The categories of this paper are: adap-org
31
The categories of this paper are: ao-sci
28
The categories of this paper are: alg-geom