This could be the first time you have heard about a white hole (WH). Meanwhile, we have been hearing for quite some time about “black holes” (BH) as regions in outer space where nothing — not even light — could escape. Such cosmological entities, roughly represented by a singularity or point of infinite energy/mass/information density and an event horizon defining the “size” of the BH, are increasingly subjects of study. In addition, the possibility of detecting gravitational signatures as the ones detected two years ago, coming allegedly from the collision and merging of two black holes, have increased their interest even more. So, what about WH?
The obscure regions of space called BH have, at least theoretically, a counterpart mathematical description, which would imply an opposite behavior; a region of space where nothing — not even light — could ever enter. For this reason, they are referred to as white holes (WH). Just as BH, WH started as a hypothetical mathematical situation with no equivalence in the physical realm, and just as BH, maybe WH do exist after all.
This is the theory Nassim Haramein has alluded to for decades. The same idea is being explored by different research teams, among them, Carlo Rovelli, a theoretical physicist at Aix-Marseille University in France, and his colleagues, who suggested that BH and WH might be connected. A BH could quantum-tunnel into a WH; once a BH evaporates to a degree where it could not shrink any further (assuming a quantized space-time), the disappearing or “dying” BH would rebound, forming a WH. This translates to matter collapsing into a BH and then emerging from a WH. As the authors Haggard and Rovelli claim “this scenario alters radically the discussion on the black hole information puzzle.” https://arxiv.org/pdf/1407.0989.pdf
Through this concept, several researchers believe that interstellar travel would be possible to go from one place to another separated by great distances, taking a shortcut: entering through a black hole which would be connected to a white hole by a wormhole that would act as a "bridge", to come out at the other end, as shown in the figures below, for two hypothetical cases.
The traveler, instead of traveling the entire "real" distance between points A and B, takes the shortcut provided by the black and white hole assembly, connected through a wormhole.
But this is not all… WH could account for most of the mysterious dark matter in the universe, some of which may even predate the Big Bang!
So, probably, we will be hearing about these new and exotic entities increasingly more…
RSF in perspective
From the generalized holographic model of Nassim Haramein, spin would be intrinsic to the vacuum dynamics, resulting from the inclusion of the torsion and Coriolis forces in the Einstein field equations and the resulting Kerr-Newman solution, called the Haramein-Rauscher solution. The density gradient, from the quantum vacuum to the macroscopic vacuum, obey these dynamics; the dynamical rotational structures of galaxies, novae, supernovae and other astrophysical structures would be driven by the space-time torsion also responsible for the observed formation of spiral galaxies.
This same dynamics would govern black holes, which would have a topology very different from that currently described by Einstein's field equations. The Haramein-Rauscher metric produces a double toroid topology, separated at the equator, which is where the matter that "escapes" or is produced in the black hole would be concentrated. And given that in the center of each galaxy we have observed the existence of black holes, sometimes older than the age of the galaxy, that would suggest that galaxies are being formed by black holes, and hence the galaxies have the shape they have, apparently horizontal, because the matter is accumulating at the equator of this dynamic.
The singularity in the black hole would have a dynamic in which, a part of the energy/matter/information flow would generate a gravitational, or compressive part in that region of space that absorbs what arrives to this region and remains trapped inside, and another part of the dynamic has the opposite behavior; it is expansive, therefore, radiative and expels what arrives to that region; nothing could enter. Both dynamics would be present in the singularity, therefore, from Haramein's perspective, a black hole is always black and white, it just depends on the perspective from which the dynamics is observed, and which aspect of it - whether the compressive, or the expansive - is being observed. According to Rovelli's perspective, black and white holes are distinct entities that would be connected through wormholes ... according to Haramein's perspective, both holes are part of the same dynamics of the information/matter/energy flow of the singularity.