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basudeba says

"[string theory] has not told us anything new about the real world, despite almost 40 years of trying."

Your summary of string theory is quite accurate and it is true that it has not yet told us anything new about physics. Yet there has been much progress and your outlook is too pessimistic. 40 years ago (1970) string theory was regarded as a tentative theory for the...

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basudeba says

"[string theory] has not told us anything new about the real world, despite almost 40 years of trying."

Your summary of string theory is quite accurate and it is true that it has not yet told us anything new about physics. Yet there has been much progress and your outlook is too pessimistic. 40 years ago (1970) string theory was regarded as a tentative theory for the strong force. It developed into a theory of quantum gravity in the 1980's. In the 1990's string theorists discovered M-theory which appears to unify the different string theories. More recently we have seen developments such as AdS/CFT and many smaller steps.

I think it is true that progress has been slow, but work has always been ongoing. Some people might compare it with the development of relativity or quantum theory which progressed in steps over similar time periods. The main difference is that string theory has developed without any new experimental input beyond what was known when it started.

I don't think that this is a failure of string theory as some people claim. The reasons why string theory has not been able to predict low energy physics are well known and as you describe them. String theory is a theory of quantum gravity that is applicable to energies well beyond anything we can test directly at present. The fact that it has many vacua means that we cannot use it to predict physics at lower energy. Some people don't like that but the history of discovery in the laws of physics has demonstrated many times over that the universe does not care much for our philosophical prejudices. A lot of people did not like the theory of relativity, and even more don't like the indeterminacy of quantum theory, but they agree very well with experiment.

Personally I am quite comfortable with the idea that our universe is described by some random vacuum of string theory which may be selected on anthropic grounds. I did not want it to be that way, but if physics tells us that the universe works like that then I can learn to appreciate it. This does not mean that string theory will never make a prediction. When we know more about physics beyond the standard model we may be able to figure out the details of the selected vacuum. Even if we can't we may be able to put some testable constraints on it. Even if we cant do that we may be able to find some other testable prediction from string theory such as a signature from the big bang. Even if we cant do that it does not mean that string theory is wrong, just that it is terribly difficult to relate to observation.

The way we have understood string theory over the 40 years has changed dramatically every ten years or so. We still don't have the ideal formulation that string theorists seek so we may see it very differently in 10 years time. I don't think it has a sell by date after which it has failed. It will fail only if it is shown to be inconsistent with observation or if another theory is found to work better. At this time many of the best theoretical physicists still think string theory is the best approach to quantum gravity. I tend to agree. It may take a few more years for the mathematics to develop sufficiently for us to really understand it well enough to see why it is right. Then it will tell us something about the real world. In the meantime, physicists are free to explore any alternatives they can think of, but none have come as near to a theory of quantum gravity as string theory.

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Dear Dr. Gibbs,

I find it very strange that the scientific world is obsessed with mathematics (admittedly, my essay did dabble with it when offering a version of E=mc2 to suit the digital world - but I kept it very simple ... so simple it might be regarded as wrong). Math seems to be regarded as infallible, even though it leads to mistakes. The mistake I have in mind is string theory. I...

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Dear Dr. Gibbs,

I find it very strange that the scientific world is obsessed with mathematics (admittedly, my essay did dabble with it when offering a version of E=mc2 to suit the digital world - but I kept it very simple ... so simple it might be regarded as wrong). Math seems to be regarded as infallible, even though it leads to mistakes. The mistake I have in mind is string theory. I don't deny that there certainly is value in the theory, and in maths, but logic reveals shortcomings. Let me explain, after first writing a short section describing an unconventional approach to unveiling unification and offering an alternative to the Higgs boson that relies on gravitational waves.

ALTERNATIVE TO HIGGS BOSON

An important step might be to think of "... the grand design of the universe, a single theory that explains everything" (words used by Stephen Hawking on the American version of Amazon, when promoting his latest book “The Grand Design” – coauthored with Leonard Mlodinow, Bantam Books, 2010) in a different way than physicists who are presently working on science's holy grail of unification. The universe’s underlying electronic foundation* (which makes our cosmos into a partially-complete unification, similar to 2 objects which appear billions of years or billions of light-years apart on a huge computer screen actually being unified by the strings of ones and zeros making up the computer code which is all in one small place) would make our cosmos into physics’ holy grail of a complete unification if it enabled not only elimination of all distances in space and time, but also elimination of distance between (and including) the different sides of objects and particles. This last point requires the universe to not merely be a vast collection of the countless photons, electrons and other quantum particles within it; but to be a unified whole that has “particles” and “waves” built into its union of digital 1’s and 0’s (or its union of qubits – quantum binary digits). If we use the example of CGH (computer generated holography, these "particles" and "waves" could be elements produced by the interaction of electromagnetic and presently undiscovered gravitational waves, producing what we know as mass and forming what we know as space-time. Einstein predicted the existence of gravitational waves, and measurements on the Hulse-Taylor binary-star system resulted in Russell Hulse and Joe Taylor being awarded the Nobel Prize in Physics in 1993 for their work, which was the first indirect evidence for gravitational waves. The feedback of the past and future universes into the unified cosmos's electronic foundation would ensure that both past and future could not be altered. Our brains and minds are part of this unification too - which must mean extrasensory perception and telekinetic independence from technology are possible, despite modern science's objections to these phenomena which appear to be based on non-unification.

* For more information on the universe's proposed electronic foundation, please see my article and postings at

http://fqxi.org/community/forum/topic/814

STRINGS ARE ONLY PART OF MATTER'S BASIS

Space and time only exist in our experience. They are emergent properties, like wetness and mind. We experience wetness because it emerges from the building blocks of the hydrogen and oxygen atoms which make up water. We experience mind because it emerges from the building blocks of neurons composing the brain. And we experience space-time since it emerges from the building blocks making up the universe. These units are a combination of electromagnetic pulses (forming a cosmic computer which includes randomness and thus the potential to escape rigid preprogramming, and have a small degree of free will) as well as a cosmic hologram (this is produced by the interaction of electromagnetic plus gravitational waves and combination of the holographic aspect with the electronic aspect unifies general relativity with quantum physics). Every physical and nonphysical part of the universal hologram would be a receptor for the downloading of data from the cosmic computer which not only exists in the hyperspace of the large-scale universe but also in the hyperspace of each subatomic particle. (In other words, the holographic universe or spacetime we know is a screen for displaying data from the 5th-dimensional computer.)

It might be helpful to visualise time as the playing of a CD or video tape. The entire disc or tape obviously exists all the time. But our physical senses can only perceive a tiny part of the sound and the sights at any fraction of a second. I believe space and time are infinite, so it might be more accurate to visualise time as that HUGE number - in this case, of CDs or tapes - which some versions of string theory propose (10 exponent 500). My essay tells you exactly how to travel to the future, how to return home, and how to travel into our past. Neither future nor past can be altered (a blow to our belief that we have the free will to shape the future) and my explanation of travel to the past requires re-interpretation of the concepts of "multiverse" and "parallel universes". It also requires the ability to travel billions of light years INSTANTLY - no doubt many readers will instantly dismiss the essay because their preconceptions "know" this simply isn't possible. It indeed sounds like pure fantasy, but I outline an approach based on electrical engineering, General Relativity, and Miguel Alcubierre's 1994 proposal of "warp drive" that makes it logically possible.

My essay explains why the universe is a Mobius loop and how it is contained in, or unified with, each of its particles (relying on physical senses or 21st-century scientific instruments would make this statement ridiculous). Then each fermion and boson would also be composed of the 3 spatial dimensions, the 4th dimension of time, and the 5th dimension of hyperspace. Detectors like the Large Hadron Collider would be unable to "see" the time and hyperspace components of particles but could only see the small (maybe 5% of the whole) 3 spatial dimensions (the time and hyperspace components would be what we call dark matter), erroneously assuming particles are those small fractions of a Mobius loop that physics calls strings. "Dark matter" would exert a gravitational influence because both time and hyperspace, being parts of a curved Mobius loop (whether of quantum or cosmic scale), would push objects together in the same way Einstein's curved space-time pushes objects together. We can speak of the HST now - no, not the Hubble Space Telescope but Hyperspatial SpaceTime. We can visualise the Mobius loop as composed of a hyperspace computer which generates information on how things change from one presently undetectably tiny fraction of a second to the next (we call this time, and it's comparable to the frames in a movie) and transmits the data (transmits dark energy) to the insignificant portion of length, width and depth that makes up subatomic particles ... and the universe.

That's the end of my one-paragraph summary. Now for some extra thoughts -

Preceding the Big Bang (which created this local section of the infinite, eternal universe ... or if you prefer, this subuniverse of the megauniverse) there would have been no space, matter or time in this subuniverse. No transmissions of dark energy (creating time and space/matter) would have occurred - therefore the dark-energy content of the universe would have been zero, increasing to the present 72% as more and more matter was created. How is matter created? Perhaps as cosmologist Alan Guth once suggested -

"You might even be able to start a new universe using energy equivalent to just a few pounds of matter. Provided you could find some way to compress it to a density of about 10^75 (10 exponent 75) grams per cubic centimeter, and provided you could trigger the thing ..."

At the time the Cosmic Microwave Background was emitted (less than a million years after the big bang), results from the Wilkinson Microwave Anisotropy Probe say the dark-energy content of the universe was negligible. Space/matter has been increasing since the big bang so transmissions from hyperspace computer (dark energy) which create them are increasing while the volume of the Mobius loop occupied by time/hyperspace (dark matter) has been shrinking as a result - according to the WMAP satellite, from 63% when the CMB was emitted to 23% today. Why isn't dark energy increasing at the same rate dark matter is decreasing? It must be because, as stated earlier, both time and hyperspace exert a gravitational influence, thereby mimicking space and matter to a degree. This mimicry causes the dark matter between the start of the CMB and the present to decrease by only about 40% while dark energy increases in the same period by about 70%. If we were dealing with a simple and ordinary loop, this similarity would cause dark matter and dark energy to be more or less equal and if there was any difference in their amount of decrease/increase, it would be in the same direction. But we’re talking about Mobius loops which are like strips of paper that have been twisted 180 degrees before the ends are joined. This causes their variation to go in different directions (one increases, the other decreases) and the amount of variation is quite significant (+72%, -40%). My guess is that the real-life twist occurs in the temporal segment of the loop, enabling a traveller in time to go in different directions i.e. into the future or into the past.

My essay tells you how to travel into the future, how to return home, and how to take a trip into our past. Regarding travel beyond our start and into the past ... it can’t be denied that these paragraphs imply the possibility of humans from the distant future time-travelling to the distant past and using electronics to create this particular subuniverse's computer-generated Big Bang. An accomplishment such as this would be the supreme example of “backward causality” (effects influencing causes) promoted by Yakir Aharonov, John Cramer and others. However, realising that we live in a cosmic-quantum unification with zero-separation and recalling Isaac Newton’s inverse-square law and what it says about the force between two particles being infinite (does infinite mean 10 ^ 500, the HUGE number of universes proposed by some versions of string theory?) if the distance of separation goes to zero means there's still room for God (another bit of scientifically objectionable science fiction?) because God would be a pantheistic union of the megauniverse's material and mental parts, forming a union with humans in a cosmic unification.

Best wishes,

Rodney

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I know I can't submit another essay. I don't plan to - these are just some comments that came to mind after thinking about my essay. They don't seem very relevant to the topic "Is Reality Digital or Analog?" but writing them has given even more satisfaction than writing the essay, and I'm in the mood to share them with the whole world. So if you've got time to read them...

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I know I can't submit another essay. I don't plan to - these are just some comments that came to mind after thinking about my essay. They don't seem very relevant to the topic "Is Reality Digital or Analog?" but writing them has given even more satisfaction than writing the essay, and I'm in the mood to share them with the whole world. So if you've got time to read them ...

---------------------------------------------------------
----------------

I fully realise that my essay doesn’t sound like science at all. I can appreciate that many readers think it belongs to science fiction and fantasy. It does have saving graces though. I’m amazed at how well it fits in with the discoveries of the Microwave Anisotropy Probe and with string theory, culminating in the LHC’s experimentally verified strings and my prediction of antistrings. Having said that, I must say this – it’s very strange that the scientific world is so obsessed with mathematics (admittedly, my essay did dabble with it when offering a version of E=mc2 to suit the digital world - but I kept it very simple ... so simple it might be regarded as wrong). Math seems to be regarded as infallible, even though it leads to mistakes. The (partial) mistake I have in mind is string theory. I don't deny that there certainly is value in the theory, and in maths, but logic reveals shortcomings. Let me explain, after first writing a short section describing an unconventional approach to unveiling unification and offering an alternative to the Higgs boson that relies on gravitational waves.

ALTERNATIVE TO HIGGS BOSON

An important step might be to think of "... the grand design of the universe, a single theory that explains everything" (words used by Stephen Hawking on the American version of Amazon, when promoting his latest book “The Grand Design” – coauthored with Leonard Mlodinow, Bantam Books, 2010) in a different way than physicists who are presently working on science's holy grail of unification. The universe’s underlying electronic foundation* (which makes our cosmos into a partially-complete unification, similar to 2 objects which appear billions of years or billions of light-years apart on a huge computer screen actually being unified by the strings of ones and zeros making up the computer code which is all in one small place) would make our cosmos into physics’ holy grail of a complete unification if it enabled not only elimination of all distances in space and time, but also elimination of distance between (and including) the different sides of objects and particles. This last point requires the universe to not merely be a vast collection of the countless photons, electrons and other quantum particles within it; but to be a unified whole that has “particles” and “waves” built into its union of digital 1’s and 0’s (or its union of qubits – quantum binary digits). If we use the example of CGH (computer generated holography, these "particles" and "waves" could be elements produced by the interaction of electromagnetic and presently undiscovered gravitational waves, producing what we know as mass and forming what we know as space-time. Einstein predicted the existence of gravitational waves, and measurements on the Hulse-Taylor binary-star system resulted in Russell Hulse and Joe Taylor being awarded the Nobel Prize in Physics in 1993 for their work, which was the first indirect evidence for gravitational waves. The feedback of the past and future universes into the unified cosmos's electronic foundation would ensure that both past and future could not be altered. Our brains and minds are part of this unification too - which must mean extrasensory perception and telekinetic independence from technology are possible, despite modern science's objections to these phenomena which appear to be based on non-unification.

* For more information on the universe's proposed electronic foundation, please see my article and postings at

http://fqxi.org/community/forum/topic/814

STRINGS ARE ONLY PART OF MATTER'S BASIS

Space and time only exist in our experience. They are emergent properties, like wetness and mind. We experience wetness because it emerges from the building blocks of the hydrogen and oxygen atoms which make up water. We experience mind because it emerges from the building blocks of neurons composing the brain. And we experience space-time since it emerges from the building blocks making up the universe. These units are a combination of electromagnetic pulses (forming a cosmic computer which includes randomness and thus the potential to escape rigid preprogramming, and have a small degree of free will) as well as a cosmic hologram (this is produced by the interaction of electromagnetic plus gravitational waves and combination of the holographic aspect with the electronic aspect unifies general relativity with quantum physics). Every physical and nonphysical part of the universal hologram would be a receptor for the downloading of data from the cosmic computer which not only exists in the hyperspace of the large-scale universe but also in the hyperspace of each subatomic particle. (In other words, the holographic universe or spacetime we know is a screen for displaying data from the 5th-dimensional computer.)

It might be helpful to visualise time as the playing of a CD or video tape. The entire disc or tape obviously exists all the time. But our physical senses can only perceive a tiny part of the sound and the sights at any fraction of a second. I believe space and time are infinite, so it might be more accurate to visualise time as that HUGE number - in this case, of CDs or tapes - which some versions of string theory propose (10 exponent 500). My essay tells you exactly how to travel to the future, how to return home, and how to travel into our past. Neither future nor past can be altered (a blow to our belief that we have the free will to shape the future) and my explanation of travel to the past requires re-interpretation of the concepts of "multiverse" and "parallel universes". It also requires the ability to travel billions of light years INSTANTLY - no doubt many readers will instantly dismiss the essay because their preconceptions "know" this simply isn't possible. It indeed sounds like pure fantasy, but I outline an approach based on electrical engineering, General Relativity, and Miguel Alcubierre's 1994 proposal of "warp drive" that makes it logically possible.

My essay explains why the universe is a Mobius loop and how it is contained in, or unified with, each of its particles (relying on physical senses or 21st-century scientific instruments would make this statement ridiculous). Then each fermion and boson would also be composed of the 3 spatial dimensions, the 4th dimension of time, and the 5th dimension of hyperspace. Detectors like the Large Hadron Collider would be unable to "see" the time and hyperspace components of particles but could only see the small (maybe 5% of the whole) 3 spatial dimensions (the time component would be what we call dark matter), erroneously assuming particles are those small fractions of a Mobius loop that physics calls strings. "Dark matter" would exert a gravitational influence because time, being part of a curved Mobius loop (whether of quantum or cosmic scale), would push objects together in the same way Einstein's curved space-time pushes objects together. We can speak of the HST now - no, not the Hubble Space Telescope but Hyperspatial SpaceTime. We can visualise the Mobius loop as composed of a hyperspace computer which generates information on how things change from one presently undetectably tiny fraction of a second to the next (we call this time, and it's comparable to the frames in a movie) and transmits the data (transmits dark energy) to the insignificant portion of length, width and depth that makes up subatomic particles ... and the universe.

Preceding the Big Bang (which created this local section of the infinite, eternal universe ... or if you prefer, this subuniverse of the megauniverse) there would have been no space, matter or time in this subuniverse. No transmissions of dark energy (creating time and space/matter) would have occurred - therefore the dark-energy content of the universe would have been zero, increasing to the present 72% as more and more matter was created. How is matter created? Perhaps as cosmologist Alan Guth once suggested -

"You might even be able to start a new universe using energy equivalent to just a few pounds of matter. Provided you could find some way to compress it to a density of about 10^75 (10 exponent 75) grams per cubic centimeter, and provided you could trigger the thing ..."

At the time the Cosmic Microwave Background was emitted (less than a million years after the big bang), results from the Wilkinson Microwave Anisotropy Probe say the dark-energy content of the universe was negligible. Space/matter has been increasing since the big bang so transmissions from hyperspace computer (dark energy) which create them are increasing while the volume of the Mobius loop occupied by time/hyperspace (dark matter) has been shrinking as a result - according to the WMAP satellite, from 63% when the CMB was emitted to 23% today. Why isn't dark energy increasing at the same rate dark matter is decreasing? It must be because, as stated earlier, both time and hyperspace exert a gravitational influence, thereby mimicking space and matter to a degree. This mimicry causes the dark matter between the start of the CMB and the present to decrease by only about 40% while dark energy increases in the same period by about 70%. If we were dealing with a simple and ordinary loop, this similarity would cause dark matter and dark energy to be more or less equal and if there was any difference in their amount of decrease/increase, it would be in the same direction. But we’re talking about Mobius loops which are like strips of paper that have been twisted 180 degrees before the ends are joined. This causes their variation to go in different directions (one increases, the other decreases) and the amount of variation is quite significant (+72%, -40%). My guess is that the real-life twist occurs in the temporal segment of the loop, enabling a traveller in time to go in different directions i.e. into the future or into the past. To replenish dark matter in billions of years, we merely have to extend Guth's proposal by using the knowledge of that time to create more matter.

A real-life Mobius is by no means a featureless loop, however. If, contrary to our impressions, the universe is unified with each particle it’s composed of; the WMAP satellite’s findings must apply to the quantum world. The figures 72%, 23% and 5% would not only describe the present universe’s content of dark energy, dark matter and ordinary matter but also any particle’s content of space or ordinary matter (5%), time or dark matter (23% - time is considered to be dark matter here because dark matter is regarded as ordinary matter invisible to us since it’s present in another region of the dimension we call time, just as most of a sphere is in another dimension and consequently appears as a dot when first entering Edwin Abbott’s 1884 exploration of other dimensions called “Flatland”), and hyperspace (72%: the transmissions from the hyperspace computer create space and matter, cause expansion of space on cosmic scales where there are no forces to overcome the expansion as there is in matter, and are known as dark energy – creating more matter causes that matter’s repelling gravity to bring about accelerating expansion).

Look at a picture of a Mobius (thanks to the repeating scales of fractal geometry, the apparently empty interior and exterior of the Mobius universe would actually be the same as the visible loop). Imagine the space/ordinary matter to be situated immediately counterclockwise (perhaps on the bottom of the loop) to the hyperspace segment and the time/dark matter portion to be immediately counterclockwise to the space/ordinary matter (time/dark matter would, moving clockwise, be next to the hyperspace segment).

The hyperspace transmissions flow directly into space/matter (all motion - “flow” and “transmissions” – are actually comparable to individual frames in a movie but are spoken of in everyday terms of motion for convenience, like saying the sun rises and sets) and are responsible for the large and unimpeded 72% increase, since the CMB was emitted, of dark energy. This flow rate of 72% also enters the time/dark matter section adjacent to hyperspace … but the loop’s twist seems to be in the time section. If we were to cut the loop lengthwise with scissors, previously varying the number of half-twists results in things such as two rings linked together or a knotted ring. So we get barriers to motion and blockages. Returning to the normal loop and twist, matters are less drastic and motion is merely slowed, resulting in a 23% flow rate.

If we lived in a non-unified universe of materialism, this is how things would remain (dark matter would have increased so today’s content would be a low 23%). On p. 179 of “The Grand Design” by Stephen Hawking and Leonard Mlodinow (Bantam Press, 2010) it’s stated “One requirement any law of nature must satisfy is that it dictates that the energy of an isolated body surrounded by empty space is positive …”

The only problem with that sentence, in an “everything is everywhere and everywhen” universe, is the word isolated. There can be no such thing as isolated in our cosmic-quantum unification. Page 179 also says “… if the energy of an isolated body were negative … there would be no reason that bodies could not appear anywhere and everywhere.” Does this mean you and I (plus all things in time and space) are a union of both positive and negative energy, able to display both separateness/solidity (isolation) as well as the potential to appear anywhere and everywhere? Dark matter, not being entirely positive, would be anywhere and everywhere as well as having decreased so today’s content would be a low 23% (which is what WMAP says is the case).

If everything is a union of positive and negative energy, every matter particle and force-carrying particle would be too. And the strings the Large Hadron Collider might detect (being the parts of particles’ Mobius loops it could see since those parts would be space/ordinary matter) might come in both positive and negative varieties. In 1928 English physicist Paul Dirac (1902-84) proposed that all negative energy states are already occupied by (then hypothetical) antiparticles (particles of antimatter). Building on this results in proposal of strings and antistrings.

My essay tells you how to travel into the future, how to return home, and how to take a trip into our past. Regarding travel beyond our start and into the past ... it can’t be denied that these paragraphs imply the possibility of humans from the distant future time-travelling to the distant past and using electronics to create this particular subuniverse's computer-generated Big Bang. An accomplishment such as this would be the supreme example of “backward causality” (effects influencing causes) promoted by Yakir Aharonov, John Cramer and others. However, realising that we live in a cosmic-quantum unification with zero-separation and recalling Isaac Newton’s inverse-square law and what it says about the force between two particles being infinite (does infinite mean 10 ^ 500, the HUGE number of universes proposed by some versions of string theory?) if the distance of separation goes to zero means there's still room for God (another bit of scientifically objectionable science fiction?) because God would be a pantheistic union of the megauniverse's material and mental parts, forming a union with humans in a cosmic unification.



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