positive or negative spatial curvature are consistent with the theory and with current observations in cosmology, which prefer a big-bang scenario with $\Omega_{\rm crit}=\rho/\rho_{\rm crit} \leq 1$. It is interesting that the absorber model of wave function reduction is restricted by the cosmological observations due to its Machian-type property of depending on all the charges in the entire universe.

The absorber wave function reduction theory with its associated reversal of the arrow of time is expected to be a strictly quantum phenomenon like the exclusion principle or quantum spin; there is not anticipated to be a classical analog of this process, so that macroscopic premonitory signals propagated at the speed of light are forbidden to exist. Thus, there is no conflict of this theory with the second law of thermodynamics, i.e. the arrow of time created by the increase of entropy at the macroscopic level will not conflict with the quantum reversal of the arrow of time. However, the theory does open the possibility of quantum premonitory exchange of information which could have fundamental importance for quantum computer devices or other quantum devices; the EPR phenomenon has already produced interesting proposals for quantum cryptography[@Ekert].

The idea of an advanced electromagnetic 