Density Field Power Asymmetry

The amplitude of the matter power spectrum measured on one hemisphere of the sky differs from the opposite hemisphere at a level that exceeds ΛCDM cosmic variance expectations. This power asymmetry — detected in both the CMB and in galaxy surveys — implies a large-scale gradient in the initial power spectrum amplitude that is not predicted by statistically isotropic inflation. Several ad hoc modifications to inflation have been proposed, but none follow naturally from first principles. SCT generates power asymmetry as an inevitable consequence of the collision geometry. The superluminal collision between two pockets was not perfectly symmetric: the collision impact parameter, which determines the angular momentum deposited, also creates an asymmetry between the leading and trailing edges of the collision front, depositing slightly more kinetic energy density on one side of the thermalized region than the other.

This energy density gradient produces a large-scale power spectrum modulation aligned with the collision axis — more power on the side that received the higher energy deposit, less on the opposite side. The amplitude of this asymmetry is proportional to the collision impact parameter divided by the pocket size, and its angular scale corresponds to the angular size of the thermalized region on the last-scattering surface. SCT therefore predicts that the power asymmetry axis is aligned with the CMB quadrupole-octupole axis, the galaxy distribution dipole, and the ecliptic plane — all of which trace the same underlying collision geometry. The observed power asymmetry is thus not a statistical fluke requiring inflation modifications but a geometric fossil of the original collision event.