Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Transit time of a freely-falling quantum particle in a background
  gravitational field   Using a model quantum clock, I evaluate an expression for the time of a
non-relativistic quantum particle to transit a piecewise geodesic path in a
background gravitational field with small spacetime curvature (gravity
gradient), in the case that the apparatus is in free fall. This calculation
complements and extends an earlier one (Davies 2004) in which the apparatus is
fixed to the surface of the Earth. The result confirms that, for particle
velocities not too low, the quantum and classical transit times coincide, in
conformity with the principle of equivalence. I also calculate the quantum
corrections to the transit time when the de Broglie wavelengths are long enough
to probe the spacetime curvature. The results are compared with the calculation
of Chaio and Speliotopoulos (2003), who propose an experiment to measure the
foregoing effects.

21
The categories of this paper are: adap-org
31
The categories of this paper are: ao-sci
27
The categories of this paper are: comp-gas
14
The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc
24
The categories of this paper are: dg-ga
37
The categories of this paper are: supr-con
15
The categories of this paper are: nucl-ex
36
The categories of this paper are: cmp-lg
1
The categories of this paper are: cs
25
The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an
18
The categories of this paper are: econ
22
The categories of this paper are: chao-dyn
16
The categories of this paper are: stat
3
The categories of this paper are: physics