Gravitational wave detectors based on matter wave interferometers (MIGO)   are no better than laser interferometers (LIGO)
  We show that a recent claim that matter wave interferometers have a much higher sensitivity than laser interferometers for a comparable physical setup is unfounded. We point out where the mistake in the earlier analysis is made. We also disprove the claim that only a description based on the geodesic deviation equation can produce the correct physical result. The equations for the quantum dynamics of non-relativistic massive particles in a linearly perturbed spacetime derived here are useful for treating a wider class of related physical problems. A general discussion on the use of atom interferometers for the detection of gravitational waves is also provided. 
Albert Roura, Dieter R. Brill, B.L. Hu, Charles W. Misner, William D.   Phillips