Abstract
We will demonstrate that the number of states, based on entropy, is related to the Hubble sphere radiation energy gap, which is directly linked to the Hubble sphere mass gap (energy gap) recently introduced by Haug [1–3]. This energy gap represents the minimum energy a photon can possess inside a black hole Hubble sphere. Moreover, this minimum energy leads to a minimum acceleration that has been detected, suggesting that the Hubble pressure that also can be called entropic pressure may have already been observed.