Re: Paper Series: Shift-symmetry in Einstein’s Universe

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Sujet : Re: Paper Series: Shift-symmetry in Einstein’s Universe
De : hitlong (at) *nospam* yahoo.com (gharnagel)
Groupes : sci.physics.relativity
Date : 13. Jul 2024, 23:08:50
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Organisation : novaBBS
Message-ID : <f7894fbe07064dd476312ba12bffc34f@www.novabbs.com>
References : 1 2 3 4 5
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On Sat, 13 Jul 2024 20:17:32 +0000, Ross Finlayson wrote:
>
Hmm... so now some scientists, physicists, and mathematicians
(I hesitate to call them, "researchers") say they've written
a formalism where the superluminal or tachyonic isn't
imcompatible with Special Relativity, after all.
>
https://journals.aps.org/prd/abstract/10.1103/PhysRevD.110.015006
Just published last month, but the Figure 1 recalls the
"reinterpretation" "principle" (RIP) of Bilaniuk, Deshpanda
and Sudarshan -- which I call Rest In Peace.  Backward in
time was a BIG problem with RIP, which they endorsed to
solve the negative energy problem arising from the four-
momentum formalism: P' = eta P = gamma[E/c - pv/c, p - vE/c].
Unfortunately, p > E/c for tachyons, so for some values of
v/c, E' is negative.  BDS hypothesized that negative energy
meant the tachyon was traveling backward in time for certain
certain values of v and appeared to go in the opposite direction.
They didn't bother to look at the 3-momentum term which didn't
reverse under those conditions: p NEVER reverses sign in the 4MF.
The only credible conclusion is that the 4MF is not valid
when E' reverses sign.  This is confirmed by the fact
that if the basic equations
E = mc^2/sqrt(u^2/c^2 - 1)
p = mu/sqrt(u^2/c^2 - 1)
are valid then, by the first postulate,
E' = mc^2/sqrt(u'^2/c^2 - 1)
p' = mu'/sqrt(u'^2/c^2 - 1)
are also valid, and E' NEVER reverses sign over the full
range -infinity < u' < infinity!  This has been explained in
DOI: 10.13189/ujpa.2023.170101.
If you remember, DON'tknOw contended that the 4MF was a
"definition" and therefore inviolate, which, of course,
is the purest baloney since E' can be derived by applying
u = (u' + v)/(1 + uv/c^2) to E = mc^2/sqrt(u^2/c^2 - 1).
The problem with the 4MF when applied to tachyons is that
a quaint little mathematical rule gets violated when the
1 + uv/c^2 term goes negative.  BDS forgot about this and
thus RIP was born -- and died when it pointed out.
"Civilization advances by extending the number of important
operations which we can perform without thinking of them."
― Alfred North Whitehead
This adage has its limitations, particularly in physics.
One must make sure the tools still work when moving into
a new domain.

Date Sujet#  Auteur
11 Jul 24 * Paper Series: Shift-symmetry in Einstein’s Universe24Eric_Baird
11 Jul 24 +* Re: Paper Series: Shift-symmetry in Einstein’s Universe22Mikko
11 Jul 24 i`* Re: Paper Series: Shift-symmetry in Einstein’s Universe21gharnagel
11 Jul 24 i +* Re: Paper Series: Shift-symmetry in Einstein’s Universe5gharnagel
11 Jul 24 i i`* Re: Paper Series: Shift-symmetry in Einstein’s Universe4Maciej Wozniak
11 Jul 24 i i `* Re: Paper Series: Shift-symmetry in Einstein’s Universe3gharnagel
12 Jul 24 i i  `* Re: Paper Series: Shift-symmetry in Einstein’s Universe2gharnagel
12 Jul 24 i i   `- Re: Paper Series: Shift-symmetry in Einstein’s Universe1Maciej Wozniak
11 Jul 24 i +* Re: Paper Series: Shift-symmetry in Einstein’s Universe10Ross Finlayson
11 Jul 24 i i+- Re: Paper Series: Shift-symmetry in Einstein’s Universe1Mantra Bajukov Chao
13 Jul 24 i i`* Re: Paper Series: Shift-symmetry in Einstein’s Universe8Ross Finlayson
14 Jul 24 i i `* Re: Paper Series: Shift-symmetry in Einstein’s Universe7gharnagel
14 Jul 24 i i  +- Re: Paper Series: Shift-symmetry in Einstein’s Universe1Ross Finlayson
14 Jul 24 i i  +- Re: Paper Series: Shift-symmetry in Einstein’s Universe1Sigfredo Mészáros
14 Jul 24 i i  `* Re: Paper Series: Shift-symmetry in Einstein’s Universe4Richard Hachel
14 Jul 24 i i   `* Re: Paper Series: Shift-symmetry in Einstein’s Universe3gharnagel
14 Jul 24 i i    `* Re: Paper Series: Shift-symmetry in Einstein’s Universe2Ross Finlayson
15 Jul 24 i i     `- Re: Paper Series: Shift-symmetry in Einstein’s Universe1gharnagel
12 Jul 24 i `* Re: Paper Series: Shift-symmetry in Einstein’s Universe5Mikko
13 Jul 24 i  `* Re: Paper Series: Shift-symmetry in Einstein’s Universe4gharnagel
13 Jul 24 i   +- Re: Paper Series: Shift-symmetry in Einstein’s Universe1Maciej Wozniak
14 Jul 24 i   +- Re: Paper Series: Shift-symmetry in Einstein’s Universe1Jermaine Grammatakakis
14 Jul 24 i   `- Re: Paper Series: Shift-symmetry in Einstein’s Universe1Jonhantan Escamilla
12 Jul 24 `- Re: Paper Series: Shift-symmetry in Einstein’s Universe1Eric_Baird

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