  A dynamical, non-Euclidean spacetime geometry in general relativity theory
implies the possibility of gravitational radiation. Here we explore novel
methods of detecting such radiation from astrophysical sources by means of
matter-wave interferometers (MIGOs), using atomic beams emanating from
supersonic atomic sources that are further cooled and collimated by means of
optical molasses. While the sensitivities of such MIGOs compare favorably with
LIGO and LISA, the sizes of MIGOs can be orders of magnitude smaller, and their
bandwidths wider. Using a pedagogical approach, we place this problem into the
broader context of problems at the intersection of quantum mechanics with
general relativity.
