Years ago I studied the Quantum Mecchanics. The theory is "hard" to grasp partly since it is work in progress. 100 years from now our measurements (e.g. from the LHC) will be part of the classical physics but I think our interpretations will be considered completely outdated.
You describes a vibrant nature of particles very convincingly in all four peices, I think. The first three pieces maybe more so, the fourth being more a gathering of mass, (explosions?), dynamics. Gravity is vibrant? weak? omnipresent? By gravity, my body interacts with stars in other galaxies? Gravity is impossibly weak per particle. Remember; gravity is not gathering of mass.
Very powerful music. Should be compulsory reading on all Departments of Physics, just as Holst's Planets is today. You are talented, keep composing!
/ BR Tomas F.