Hmmm. Have you considered that a Malamet-Hogarth Spacetime, (mathematically speaking), would conflate with your blackhole-wormhole conundrum? Specifically: Forever is a Day: Supertasks in Pitowsky and Malament-Hogarth Spacetimes (book stub). Forever is a Day: Supertasks in Pitowsky and Malament-Hogarth Spacetimes | Philosophy of Science | Cambridge Core
Concomitant with: Unruh deWitt probe of late time revival of quantum correlations in Friedmann spacetimes [2210.11186] Unruh deWitt probe of late time revival of quantum correlations in Friedmann spacetimes (arxiv.org) Meaning, if we live in a universe that has mass, then transversable wormholes are to be expected. This was the point of the news note, that I posted the other day.Wormholes May Be Hiding In Plain Sight, Says Study, Demonstrates How Wormholes May Already Have Been Detected, Physicists Say : ScienceAlert With our insufficient equipment (as good as it is!) the astronomers may not have recognized a white hole, as in transversable, if it came up behind them, and bit them on the ass. It's not their fault, it's just that we haven't pursued the best that we could have in physics and astronomy. What will change for us mortals, if crossable spacetimes are trivially, true? Maybe Nothing! We're, as always, fired up by war and money and power. The science fiction would get better, me thinks. We still have taxes to pay, etc... -----Original Message----- From: Jesse Mazer <laserma...@gmail.com> To: everything-list@googlegroups.com Sent: Thu, Nov 17, 2022 11:41 am Subject: Re: Is Special Relativity valid for accelerating frames of reference? TY. On Thu, Nov 17, 2022 at 9:41 AM John Clark <johnkcl...@gmail.com> wrote: On Wed, Nov 16, 2022 at 7:25 PM <spudboy...@aol.com> wrote: > Setting aside relativity for the nonce, the workability of transversable > wormholes is getting more, better! https://journals.aps.org/prd/abstract/10.1103/PhysRevD.106.104024 The trouble with the idea that a Black Hole is the mouth of a wormhole is that the other end of the wormhole should be a White Hole and nobody has ever detected one That paper is about traversable wormholes held open by exotic matter, which probably could not form naturally (Kip Thorne talked in his paper about what might be possible for an 'advanced civilization'), but the traversable wormhole solution doesn't involve any event horizons, black hole or white hole. The idea of a black hole containing a wormhole comes from the eternal Schwarzschild black hole, but it's physically unrealistic because from the perspective of external observers this type of black hole would exist forever both in the past and future, whereas a physically realistic black hole would form from collapsing matter, from what I understand the GR solutions that have been found for dynamically formed black holes don't involve wormholes. The Schwarszschild black hole contains both a black hole interior region and a white hole interior region, though external observers would be able to see *both* particles emerging from the white hole region and particles falling in towards the black hole region, so from the outside it doesn't look specifically like a black hole or a white hole (and there are two distinct 'outside' regions, sometimes described as different 'universes' though they are all part of single connected spacetime). I think the diagram of the eternal Schwarzschild black hole in Kruskal-Szekeres coordinates is probably the most intuitive way to think about the weirdness of this solution since the diagram makes light cones look the same way they do in SR, there's a qualitative description of the diagram at https://en.wikipedia.org/wiki/Kruskal–Szekeres_coordinates#Qualitative_features_of_the_Kruskal–Szekeres_diagram-- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to everything-list+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/everything-list/CAPCWU3KzZ2H1Hg2jLhbBA8r-jA-ckvA%3D78tq0bBChk0Ng8Y3Mw%40mail.gmail.com. -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to everything-list+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/everything-list/736661455.927773.1668711224899%40mail.yahoo.com.
