  I have shown conceptually that quantum state has a direct relationship to
gravitational constant due to entropic force posed by Verlinde's argument and
part of the Newton-Schr\"odinger equation (N-S) in the context of gravity
induced collapse of the wavefunction via Di\'osi-Penrose proposal. This direct
relationship can be used to measure gravitational constant using
state-of-the-art mater-wave interferometry to test the entropic gravity
argument.
