One possible solution to the above problem could be, that the QV does not only contain

photons and fermions, but also other bosons, like gluons. In this sense, [8] suggested that the QV might also be the source of fields of other fundamental interactions. But so far, only EM-radiation (ZPR) has been found to exist in QV.

The above-mentioned 11.71 leptons per Planck volume (V_P) mean that, on average, there are a little less than 12 leptons per V_P, so that most frequently, the integer number of leptons in a V_P is 12.  Since these 12 leptons correspond to virtual pairs that anihilate and create mutually in an endless cycle together with the corresponding gamma-particles involved (virtual pairs produce gamma-particles and visa-versa), at any time, there is an amount of 6 pairs in a V_P, which at the very moment of their mutual interaction, take a space analogous to 6 particles or strings.

In this context, the California Institute for Physics and Astrophysics mentions on its homepage that “it now appears that quantum field theory may be the low energy limit of superstring theory”. String theory predicts, as generally known, that strings represent a 6-D curled microscopic space in 4-D spacetime, so that the total dimensions of a particle is 10.

Finally, the 6 particle pairs found in a V_P are surprisingly coincident with the figure of 6 curled dimensions of strings, which correspond to the interior region of elementary particles. In addition, since space-time and QV are, as shown above, two different spaces, the immediate conclusion is that they also have a different number of dimensions (since two spaces with the same number of dimensions would belong obviously to the same space). But, as seen, QV and space-time have a different overall radiation content.

Taking the model of string-theory and applying it to QV, it results that QV is a 6-D space, since in this way, each QV-V_P would have just the necessary space to contain 6 particles (strings, equivalent to 6 virtual pairs at the very moment of their mutual interaction), so that each particle (string) would be correctly placed in its own and exclusive dimension. This is in principle possible, since strings are believed to be of the Planck length and one-dimensional. In consequence, any of the strings would be included in a Planck section of the corresponding dimension.

In consequence, the universe can be understood as consisting of a macroscopic 4-D space-time, surrounded by a macroscopic 6-D QV, being both of these two spaces linked together by elementary particles, the thermal surface of the particles being 4-D and interacting mainly with space-time, while the supercold interior region of the particles is 6-D and interacts mainly with the QV, being the total number of dimensions 10, as foreseen in string theory.  Because of their above-mentioned apparently complex structure, particles can be understood as small interfaces that link space-time to QV.