Month: September 2022

GOAL. “The main purpose of this paper is to give a more general discussion of how in the quasi-classical framework the black hole can transition to the white hole.” https://lnkd.in/dUKnus8 View in LinkedIn

NEW PERSPECTIVE, “While the transition to the white hole is still assumed to be on a spacelike hypersurface at a minimum circumferential radius r = a separating the trapped surfaces in the interior of the black hole from the anti-trapped 2-surfaces in the interior of the white hole, I consider alternative scenarios for evolution of the white hole, in which the white hole only emits negative energy for a limited Planck-scale range of retarded time.” https://lnkd.in/dUKnus8 View in LinkedIn

ROLE OF THE OBSERVER. “The geometry and effective stress-energy tensor in the neighborhood of the outer edge of the transition hypersurface, where the black hole horizon ends and the white hole horizon begins as seen by external observers, is analyzed in Part III.” https://lnkd.in/dUKnus8 View in LinkedIn

SPACE “is big. Really big. You just won’t believe how vastly, hugely, mindbogglingly big it is. I mean, you may think it’s a long way down the road to the chemist’s, but that’s just peanuts to space.” Douglas Adams, Hitchhiker’s Guide to the Universe. https://lnkd.in/dDeqdgh View in LinkedIn

Fearful suymmetry in Mr Puddings. View in LinkedIn

NEGATIVE ENERGY. “Instead of the negative energy and quantum information associated with Hawking "partners" propagating at constant retarded time across the white hole horizon over the entire lifetime of the white hole, as in the model of Paper I, most of the negative energy remains inside a white hole of fixed Planck-scale mass until it meets the rebounding matter shell, though the quantum information may continues to emerge in the form of vacuum fluctuations propagating across the white hole horizon.” https://lnkd.in/dUKnus8 View in LinkedIn

NO HOLOGRAPHIC UNIVERSE. “In Part VI, I explain in more detail than in Paper I why the standard holographic interpretation of black hole entropy, in which the log of the number of black hole quantum microstates is identified with the thermodynamic Bekenstein-Hawking entropy proportional to the horizon area, is untenable if the black hole evolves into a white hole.” https://lnkd.in/dUKnus8 View in LinkedIn

REPERCUSSIONS. “This has implications for the validity of the generalized second law and certain quantum singularity theorems as applied to black holes.” https://lnkd.in/dUKnus8 View in LinkedIn

ASSUMPTIONS. “The model assumes spherical symmetry of the geometry, which, while the black hole is large, is extremely close to Schwarzschild near and outside of the black hole horizon.” https://lnkd.in/dUKnus8 View in LinkedIn

PROBLEM. “Numerical calculations of the renormalized semi-classical stress-energy tensor outside the horizon of a Schwarzschild black show a flow of negative energy into the black hole starting a finite distance outside the horizon, and are inconsistent with an outflow of positive energy Hawking radiation from pair creation or tunneling very close to the horizon.” https://lnkd.in/dUKnus8 View in LinkedIn