Heisenberg's Uncertainty Principle (HUP) tells us that the standard deviation in position times the standard deviation in momentum is equal to Planck's constant divided by 4π. And HUP also causes there to be a zero point energy in the fields of QFT. This is because position and moment can not both be zero. And since the position is constrained to be finite, there must be some momentum. And with momentum there must be some non-zero energy. We are also told that the zero-point-energy is also called the vacuum energy or dark energy that is causing the universe to accelerate in its expansion. However, even in gravitational waves, spacetime stretches and then returns to normal. Yet there must be some acceleration in spacetime expansion in order for it to stretch and contract as a gravitational wave goes by. So if the acceleration of expansion of spacetime is caused by a change in dark energy, a.k.a zero-point-energy, then there must also be a corresponding change in the multiplication of entities in the HUP. This would mean that the value of h-bar would have to be changing as a gravitation wave goes by. I'm not stating that this is the case. I'm asking if this is correct. Thanks.