Text Size

 

On Jan 8, 2014, at 2:29 PM, Ruth Kastner <This email address is being protected from spambots. You need JavaScript enabled to view it.> wrote:


I'm enjoying Rob's analysis which I think is very helpful.
 
Agreed

Based on his comments it occurred to me that it might be useful to recall that Aristotle talked about four kinds of explanatory causes for any phenomenon: material, efficient, formal, and final. In these terms Jack is content with a formal cause (the symmetries) as an explanation,
 
See below
 
while Jim and Paul regard that as inadequate. Instead they seem to be looking for a material and/or efficient cause.
 
Are they? Let's review.
 
Four Causes refers to an influential principle in Aristotelian thought whereby causes of change or movement are categorized into four fundamental types of answer to the question "why?". Aristotle wrote that "we do not have knowledge of a thing until we have grasped its why, that is to say, its cause."[1][2] While there are cases where identifying a cause is difficult, or in which causes might merge, Aristotle was convinced that his four causes provided an analytical scheme of general applicability.[3]
Aristotle held that there were four kinds of causes:[2][4]
  • A change or movement's material cause is the aspect of the change or movement which is determined by the material which the moving or changing things are made of. For a table, that might be wood; for a statue, that might be bronze or marble.
 
I say the material cause is the "marble" of Einstein's geometrodynamical field molded by the "wood" of the stress-energy current densities of all the non-gravity fields.
 
Therefore, I invoke a material cause as well as symmetries.
 
  • A change or movement's formal cause is a change or movement caused by the arrangement, shape or appearance of the thing changing or moving. Aristotle says for example that the ratio 2:1, and number in general, is the cause of the octave.
  • A change or movement's efficient or moving cause refers to things apart from the thing being changed or moved, which interact so as to be an agency of the change or movement. For example, the efficient cause of a table is a carpenter, or a person working as one, and according to Aristotle the efficient cause of a boy is a father.
  • An event's final cause is the aim or purpose being served by it. That for the sake of which a thing is what it is. For a seed, it might be an adult plant. For a sailboat, it might be sailing. For a ball at the top of a ramp, it might be coming to rest at the bottom.
I am definitely into teleological final cause - Destiny in a Block HOLOGRAM Universe.
 
the future and past cosmological horizons encode the interior bulk
 
the horizons are the hologram plates (computers)
 
the interior bulk are the hologram images
 
  1. Seth Lloyd on The universe as quantum computer - H+ Magazine

    hplusmagazine.com/.../video-friday-brainfood-seth-lloyd-on-the-univers...
     
    Dec 27, 2013 - A recent paper from Dr. Lloyd discusses limits to digital computation as we now employ it, but he further shows that the universe itself is a sort of ...
 
  1. "Our Holographic Universe" --Will It Prove to Be the Greatest Theory ...

    www.dailygalaxy.com/.../our-holographic-universe-it-could-prove-to-be...
     
    Dec 14, 2013 - Re 'vk', just preceding this comment: perhaps one might be able to move in the 3rd dimension of a hologram if one was part of a virtual world...
  2. Physics breakthrough: Is the universe a giant hologram? — RT News

    rt.com/news/space-evidence-universe-hologram-195/
     
    Dec 13, 2013 - In physics, the 'holographic principle' is a property described in string theory. ... This produced a world without gravity laws. However, it did not ...
  3. Holographic principle - Wikipedia, the free encyclopedia

    en.wikipedia.org/wiki/Holographic_principle
     
    For the book by Michael Talbot, see The Holographic Universe. .... because the world-sheet theory of string theory was just such a holographic description.
    You've visited this page 5 times. Last visit: 2/13/13
 
 
This email address is being protected from spambots. You need JavaScript enabled to view it.." type="application/x-shockwave-flash">This email address is being protected from spambots. You need JavaScript enabled to view it.." />
 
http://en.wikipedia.org/wiki/Four_causes
 

I think this points up how important it is to be aware  there is a meta-question involved here concerning what constitutes an adequate explanation and that this is probably what most of the disagreement is really about. Is there a 'right answer' to this? I doubt it, but it's probably good to have as many of the 'causes' addressed as possible (except perhaps for 'final cause' which invokes notions of design and takes us farther away from modern science as usually understood).
 
Here I strongly disagree.
 


Ruth
 
On Jan 8, 2014, at 1:41 AM, Robert Addinall <This email address is being protected from spambots. You need JavaScript enabled to view it.> wrote:

Jim,
 
I anticipated that part of your criticism might be that Jack is accepting things as primitives that aren't - that circles around the sun are nice and symmetrical but that circles being an observed fact doesn't explain why they are there. Sounds like you intend to do a detailed note or two here - so thanks, this should be more interesting than rehashing the fictitious forces argument as it stood (although I realize that this discussion will likely at some point lead right back into it).
 
One thing I'm curious about is where does the inertial reaction force fit into, align with or contradict Jack's gauge invariance math? I can make a verbal argument of sorts about how such a force would relate to the conservation law (along the lines that it is what causes an opposite and equal reaction), but I don't know where to try to plug it into the sort of detailed discussion going on here.
 
Also, I'd like to add Happy New Year to everyone here who uses the standard western calender!
 
 
Sent from my BlackBerry 10 smartphone on the Rogers network.
From: This email address is being protected from spambots. You need JavaScript enabled to view it.
Sent: Wednesday, January 8, 2014 3:24 AM
To: beowulfr@inte
Subject: RE: About to watch Downton Abbey new series - but before I forget a me
mory about Sylvan Schweber at Brandeis
 

Rob,

Paul will tell you, I expect, that Jack's "explanations" in terms of transformation invariance and Noether's theorem and the like aren't really explanations at all. And I agree. Saying that a conservation law is the physical cause of mass and inertia is really just silly. It's like saying that the Sun and Moon are circular because circles have the most perfect symmetry. Sounds profound. And says nothing about the physics of gravitational accretion and energy minimization.

To characterize my position as in some sense a theory that is independent of general relativity and so dismissable without doing violence to general relativity is also wrong. I assert that general relativity and the standard procedures of field theory, with the WMAP results, accounts for inertia and inertial forces without ANY further theoretical assumptions. Those determined to believe that the quantum vacuum has something to do with inertia are, understandably, not please with this as it renders their speculations irrelevant. But physics is about what's right, not what makes us feel warm and fuzzy.

I had planned on addressing this tonight. But it is late; and I have an early trip into LA in the morning. And I want those who are not professional physicists on the list to be able to follow the main points of the argument. That means providing some historical context, for this stuff is hard enough to follow when you know the context. Without the context, it's all a bunch of symbol salad for most. So I'll tackle this maybe tomorrow. And do it in as many digestible pieces as seems warranted. Jack can then tell everyone it's a bunch of word salad. And Paul can correct my errors. :-)

Best,

Jim
____________________________________________________________
 
On Jan 8, 2014, at 1:18 AM, Robert Addinall <This email address is being protected from spambots. You need JavaScript enabled to view it.> wrote:

 

One point I should add: when I talk about the causally connected universe from the point of view of Jim's phi=c^2 gravity, I talk about the future cosmological horizon (where the event horizon and hubble sphere coincide) because we've been assuming that Wheeler-Feynman advanced radiation-reaction is the mechanism for some of this stuff. Basically an effect propagates (ie. radiates) through spacetime in the "forward" time direction and interacts with other matter in our future, which then sends a reaction wave back through spacetime in the "backwards" direction.
 
There would be a different (more complete) definition if you were talking about the causally connected universe extending into our past.
 
However, I didn't get into such details (which have been argued over before) because I wanted to stay with relatively simple analogies that I wouldn't get terribly wrong ;)
 
Rob

 

 
On Jan 7, 2014, at 7:34 PM, Robert Addinall <This email address is being protected from spambots. You need JavaScript enabled to view it.> wrote:

There is actually potentially a really interesting discussion here.  We have Jack’s theory that particles with mass exhibit inertial resistance to being pushed off geodesic because action-reaction arises purely locally based on gauge invariance and gauge transformation – a local theory.  And, we have the opposite, a distance approach – Jim’s argument that the origin of inertia is to be found in the gravitational interaction of all matter in the causally connected universe.  Both claim to be consistent with GR, but are at opposite ends of a spectrum.
 
If we agree that spacetime curvature around sources and off-geodesic acceleration are frame invariant objective realities, then we all agree that objects in free fall will “fall” towards the COM of the Earth and that objects “hovering” in the Earth’s gravity field on the surface of the Earth due to electrical contact forces always weigh the same on a scale.  So, then the question of whether there is a real Newtonian gravity force comes down to whether a force is needed to explain why objects remain on inertial trajectories until pushed off them by electrical contact forces (ie. an “origin of inertia”) or whether the gauge invariance idea is sufficient.
 
So in terms of Jack’s gauge invariance discussion – is it wrong?  If so, why?  Is it not wrong but incomplete?  If so, why?  Then we can compare its strengths and weaknesses to the strengths and weaknesses of Jim’s argument.
 
Again, Jack’s argument (highlighted in red):
 
I actually have not seen it in any textbooks, which treat the gauge transformations purely as formal manipulations with no direct physical meaning
 
Again because the basic idea is so simple and beautiful that it's amazing that not even Feynman noticed it 
In the case of Maxwell's electromagnetic field the argument goes like this
 
The Canonical momentum of a test charge is
 
P = mv + eA
 
P is gauge invariant under U1 internal symmetry gauge transformations
 
mv -> mv + hgradS
 
eA-> eA - hgradS
 
S = quantum phase of test particle of inertia m and electric charge e
 
mv is charge's kinetic momentum
 
eA is the electromagnetic field momentum sitting smack on the center of mass of the charge
 
This is as local a contact force as one can imagine
 
hgradS is the momentum exchange of a virtual longitudinal near Field photon
 
Therefore newton's third law of action with equal and opposite reaction is trivially automatically obeyed locally between field and charged particle
 
dP/dt = 0
 
Canonical momentum is conserved in time when there were only virtual photon exchanges between particle and field forming a closed system
 
Of course A depends on faraway sources via the greens function propagator integrals with the source distributions
 
Implies
 
mdv/dt = - edA/dt = eE
 
E = electric real force field
 
When we do this in special relativity we get more terms 
 
I know how to extend the same kind of argument to the gravity field
 
Category: MyBlog

Categories ...

't Hooft 100 Year Star Ship Abner Shimony accelerometers action-reaction principle Aephraim Sternberg Alan Turing Albert Einstein Alpha Magnetic Spectrometer American Institute of Physics Andrija Puharich Anthony Valentin Anton Zeilinger Antony Valentini anyon Apple Computer Artificial Intelligence Asher Peres Back From The Future Basil Hiley Bell's theorem Ben Affleck Ben Libet Bernard Carr Bill Clinton black body radiation Black Hole black hole firewall black hole information paradox black holes Bohm brain waves Brian Josephson Broadwell Cambridge University Carnot Heat Engine Central Intelligence Agency CIA Clive Prince closed time like curves coherent quantum state Consciousness conservation laws Cosmic Landscape Cosmological Constant cosmology CTC cyber-bullying Dancing Wu Li Masters Dark Energy Dark Matter DARPA Daryl Bem David Bohm David Deutsch David Gross David Kaiser David Neyland David Tong de Sitter horizon Dean Radin Deepak Chopra delayed choice Demetrios A. Kalamidas Demetrios Kalamidas Dennis Sciama Destiny Matrix Dick Bierman Doppler radars E8 group Einstein's curved spacetime gravity Einstein's happiest thought electromagnetism Eli Cartan EMP Nuclear Attack entanglement signals ER=EPR Eric Davis Ernst Mach ET Eternal Chaotic Inflation evaporating black holes Facebook Faster-Than-Light Signals? fictitious force firewall paradox flying saucers FQXi Frank Tipler Frank Wilczek Fred Alan Wolf Free Will G.'t Hooft Garrett Moddel Gary Zukav gauge theory general relativity Geometrodynamics Gerard 't Hooft Giancarlo Ghirardi God Goldstone theorem gravimagnetism gravity Gravity - the movie gravity gradiometers gravity tetrads Gravity Waves Gregory Corso gyroscopes hacking quantum cryptographs Hagen Kleinert Hal Puthoff Hawking radiation Heisenberg Henry Stapp Herbert Gold Higgs boson Higgs field hologram universe Horizon How the Hippies Saved Physics I.J. Good ICBMs Igor Novikov inertial forces inertial navigation Inquisition Internet Iphone Iran Isaac Newton Israel Jack Sarfatti Jacques Vallee James F. Woodward James Woodward JASON Dept of Defense Jeffrey Bub Jesse Ventura Jim Woodward John Archibald Wheeler John Baez John Cramer John S. Bell Ken Peacock Kip Thorne Kornel Lanczos La Boheme Laputa Large Hadron Collider Lenny Susskind Leonard Susskind Levi-Civita connection LHC CERN libel Louis de Broglie Lubos Motl LUX Lynn Picknett M-Theory Mach's Principle Mae Jemison Making Starships and Star Gates Martin Rees Mathematical Mind MATRIX Matter-AntiMatter Asymmetry Max Tegmark Menas Kafatos Michael Persinger Michael Towler microtubules Milky way MIT MOSSAD multiverse NASA Nick Bostrum Nick Herbert Nobel Prize nonlocality Obama organized-stalking Origin of Inertia P. A. M. Dirac P.K.Dick P.W. Anderson Paranormal parapsychology Paul Werbos Perimeter Institute Petraeus Physical Review Letters Physics Today Post-Quantum Physics pre-Big Bang precognition presponse PSI WARS Psychic Repression qualia Quantum Chromodynamics quantum computers quantum entanglement quantum field theory quantum gravity Quantum Information Theory Quantum Theory RAF Spitfires Ray Chiao Red Chinese Remote Viewing retrocausality Reviews of Modern Physics Richard Feynman Richard P. Feynman Rindler effect Robert Anton Wilson Robert Bigelow Roger Penrose rotating black holes Roy Glauber Rupert Sheldrake Russell Targ Ruth Elinor Kastner S-Matrix Sagnac effect Sam Ting Sanford Underground Research Facility Sarfatti Lectures in Physics Scientific American Second Law of Thermodynamics Seth Lloyd signal nonlocality Skinwalker Ranch social networks space drive space-time crystal SPECTRA - UFO COMPUTER spontaneous broken symmetry SRI Remote Viewing Experiments Stanford Physics Stanford Research Institute Star Gate Star Ship Star Trek Q Stargate Starship Stephen Hawking Steven Weinberg stretched membrane string theory strong force gluons Stuart Hameroff superconducting meta-material supersymmetry symmetries telepathy Templeton The Guardian Thought Police time crystal time travel topological computers Topological Computing torsion UFO Unitarity unitary S-Matrix false? Unruh effect Uri Geller VALIS virtual particle Virtual Reality Warp Drive weak force Wheeler-Feynman WIMP WMAP WMD world crystal lattice wormhole Yakir Aharonov Yuri Milner