Abstract We shall study the formation of a particular class regular black holes (BHs) from gravitational collapse massive star. The inside geometry is described by spatially flat Friedmann–Robertson–Walker (FRW) metric and stellar matter distributed uniformly without any pre-assumption about its equation state. Our model generalization Oppenheimer–Snyder for BHs. have obtained density pressure ...

We reconsider the time-dependent Born-Oppenheimer theory with the goal to carefully separate between the adiabatic decoupling of a given group of energy bands from their orthogonal subspace and the semiclassics within the energy bands. Band crossings are allowed and our results are local in the sense that they hold up to the first time when a band crossing is encountered. The adiabatic decoupli...

In an era of globalization, innovation, and competitive intelligence, the nuclear supply chain is continually evolving increasing its capabilities. The top-secret operation ALSOS plays a key role in (re)evolution atomic energy as future, with constant focus on responsible use energy. US, hegemon, has harnessed leaders to their full potential, J. Robert Oppenheimer being one leading names charis...