This article is not directly linked to quantum technology or quantum computing but we think it might interest most of our readers.
For the first time, physicists have calculated exactly what kind of singularity lies at the center of a realistic black hole.
A team of researchers affiliated with Harvard University’s Black Hole Initiative (BHI) made significant progress. Paul Chesler, Ramesh Narayan and Erik Curiel probed the interiors of theoretical black holes that resemble those studied by astronomers, seeking to determine what kind of singularity is found inside. At such a point, general relativity is thought to give way to a more exact, as yet unknown, quantum-scale description of gravity.
Their analyses showed that black holes contain two distinct kinds of singularities. A black hole is encased within a sphere called an event horizon: Once matter or light crosses this invisible boundary and enters the black hole, it cannot escape. Inside the event horizon, charged stationary and rotating black holes are known to have a second spherical surface of no return, called the inner horizon. The group also found that there is indeed a central singularity, and it is always spacelike. (Quantamagazine)