The gravitational phase shift in a matter-wave interferometer (MIGO)
  The original computation did not take into account the initial phase shift. A corrected computation, included as section II in the revised version of gr-qc/0407039, still gives a term proportional to the derivative of the signal, qualitatively confirming the original result. 
Stefano Foffa (Geneva U.), Michele Papucci (Berkeley) and Riccardo   Sturani (Geneva U.)