Granularity of SpaceTime?

Here's an article:

http://www.physicsweb.org/articles/news/8/11/8/1

You know how when you look at curved outlines on hi-resolution games,
you can see the pixelation (tesselation?)?

Could atomic interferometry be used to detect the granularity of
spacetime, if it's used to measure the motion of small objects (having
significant De Broglie wavelength) in curved space (aka Gravitational
field)?

I'm in way over my head on this one. But wouldn't the granularity of
space time be something around the size of a quanta, the Planck
constant? Right now we have no way of getting at something that
small, but I think an Italian astronomer has proposed an experiment to
experiment that can infer one way or the other and that this has
applications in proving string theory.

(sanman) wrote in message . com...
Here's an article:

http://www.physicsweb.org/articles/news/8/11/8/1

You know how when you look at curved outlines on hi-resolution games,
you can see the pixelation (tesselation?)?

Could atomic interferometry be used to detect the granularity of
spacetime, if it's used to measure the motion of small objects (having
significant De Broglie wavelength) in curved space (aka Gravitational
field)?