Search FQXi


If you are aware of an interesting new academic paper (that has been published in a peer-reviewed journal or has appeared on the arXiv), a conference talk (at an official professional scientific meeting), an external blog post (by a professional scientist) or a news item (in the mainstream news media), which you think might make an interesting topic for an FQXi blog post, then please contact us at forums@fqxi.org with a link to the original source and a sentence about why you think that the work is worthy of discussion. Please note that we receive many such suggestions and while we endeavour to respond to them, we may not be able to reply to all suggestions.

Please also note that we do not accept unsolicited posts and we cannot review, or open new threads for, unsolicited articles or papers. Requests to review or post such materials will not be answered. If you have your own novel physics theory or model, which you would like to post for further discussion among then FQXi community, then please add them directly to the "Alternative Models of Reality" thread, or to the "Alternative Models of Cosmology" thread. Thank you.

Contests Home


Previous Contests

What Is “Fundamental”
October 28, 2017 to January 22, 2018
Sponsored by the Fetzer Franklin Fund and The Peter & Patricia Gruber Foundation
read/discusswinners

Wandering Towards a Goal
How can mindless mathematical laws give rise to aims and intention?
December 2, 2016 to March 3, 2017
Contest Partner: The Peter and Patricia Gruber Fund.
read/discusswinners

Trick or Truth: The Mysterious Connection Between Physics and Mathematics
Contest Partners: Nanotronics Imaging, The Peter and Patricia Gruber Foundation, and The John Templeton Foundation
Media Partner: Scientific American

read/discusswinners

How Should Humanity Steer the Future?
January 9, 2014 - August 31, 2014
Contest Partners: Jaan Tallinn, The Peter and Patricia Gruber Foundation, The John Templeton Foundation, and Scientific American
read/discusswinners

It From Bit or Bit From It
March 25 - June 28, 2013
Contest Partners: The Gruber Foundation, J. Templeton Foundation, and Scientific American
read/discusswinners

Questioning the Foundations
Which of Our Basic Physical Assumptions Are Wrong?
May 24 - August 31, 2012
Contest Partners: The Peter and Patricia Gruber Foundation, SubMeta, and Scientific American
read/discusswinners

Is Reality Digital or Analog?
November 2010 - February 2011
Contest Partners: The Peter and Patricia Gruber Foundation and Scientific American
read/discusswinners

What's Ultimately Possible in Physics?
May - October 2009
Contest Partners: Astrid and Bruce McWilliams
read/discusswinners

The Nature of Time
August - December 2008
read/discusswinners

Forum Home
Introduction
Terms of Use

Order posts by:
 chronological order
 most recent first

Posts by the author are highlighted in orange; posts by FQXi Members are highlighted in blue.

By using the FQXi Forum, you acknowledge reading and agree to abide by the Terms of Use

 RSS feed | RSS help
RECENT POSTS IN THIS TOPIC

ben: on 8/19/11 at 7:02am UTC, wrote Apple iphone:...

Jayakar Joseph: on 10/30/09 at 15:54pm UTC, wrote Dear Cristian S. Calude, As quantum indeterminacy evolves from...

NN: on 10/30/09 at 3:55am UTC, wrote Sorry for the long comments that i have put on your nice essay. perhaps you...

Narendra Nath: on 10/23/09 at 6:40am UTC, wrote It is indeed a joy to go through the freshness of your approach and a...

Cris Calude and Karl Svozil: on 10/20/09 at 19:48pm UTC, wrote Nick Mann: thanks for your explanation. "But limits, gentlemen, limits....

Nick Mann: on 10/17/09 at 17:01pm UTC, wrote CC and KS, Thanks for your thanks. But don't be modest. Your output is...

Cris Calude and Karl Svozil: on 10/17/09 at 7:50am UTC, wrote Thanks for your new comments. Cristinel Stoica: Unfortunately we don't...

George Schoenfelder: on 10/14/09 at 20:36pm UTC, wrote Dear Cristian and Karl, I much enjoyed your essay in particular modeling...


RECENT FORUM POSTS

Steve Dufourny: "lol REVOLUTION SPHERISATION everywhere at all scales,REVOLUTION..." in Alternative Models of...

Georgina Woodward: "The kind of time required, over which the material change is happening, (to..." in Schrödinger’s Zombie:...

Steve Dufourny: "after all like Borh has made,this universe and its spheres for me are like..." in Alternative Models of...

Joe Fisher: "Today’s Closer To Truth Facebook page contained this peculiar piece of..." in First Things First: The...

Joe Fisher: "Today’s Closer To Truth Facebook page contained this peculiar piece of..." in First Things First: The...

Lorraine Ford: "With the “A.I. Feynman” software, Silviu-Marian Udrescu and Max Tegmark..." in Will A.I. Take Over...

Georgina Woodward: "Coin toss co-state potentials: With the measurement protocol decided, in..." in Schrödinger’s Zombie:...

Steve Dufourny: "If we correlate with the consciousness, can we consider that all is..." in Measuring Free Will: Ian...


RECENT ARTICLES
click titles to read articles

First Things First: The Physics of Causality
Why do we remember the past and not the future? Untangling the connections between cause and effect, choice, and entropy.

Can Time Be Saved From Physics?
Philosophers, physicists and neuroscientists discuss how our sense of time’s flow might arise through our interactions with external stimuli—despite suggestions from Einstein's relativity that our perception of the passage of time is an illusion.

Thermo-Demonics
A devilish new framework of thermodynamics that focuses on how we observe information could help illuminate our understanding of probability and rewrite quantum theory.

Gravity's Residue
An unusual approach to unifying the laws of physics could solve Hawking's black-hole information paradox—and its predicted gravitational "memory effect" could be picked up by LIGO.

Could Mind Forge the Universe?
Objective reality, and the laws of physics themselves, emerge from our observations, according to a new framework that turns what we think of as fundamental on its head.


FQXi FORUM
October 23, 2019

CATEGORY: What's Ultimately Possible in Physics? Essay Contest (2009) [back]
TOPIC: Is Feasibility in Physics Limited by Fantasy Alone? by Cristian S. Calude and Karl Svozil [refresh]
Bookmark and Share
Login or create account to post reply or comment.

Author Cristian S. Calude wrote on Sep. 25, 2009 @ 17:46 GMT
Essay Abstract

Although various limits on the predicability of physical phenomena as well as on physical knowables are commonly established and accepted, we challenge their ultimate validity. More precisely, we claim that fundamental limits arise only from our limited imagination and fantasy. To illustrate this thesis we give evidence that the well-known Turing incomputability barrier can be trespassed via quantum indeterminacy. From this algorithmic viewpoint, the "fine tuning" of physical phenomena amounts to a "(re)programming" of the universe.

Author Bio

Cristian S. Calude (www.cs.auckland.ac.nz/~cristian). Chair Professor and Director of the Centre for Discrete Mathematics and Theoretical Computer Science, University of Auckland, New Zealand. Member of Academia Europaea, Hood Fellow. Research interests: Algorithmic information theory, quantum computing, mathematical logic. Cited in more than 1500 papers and books by more than 150 authors. Featured in the "New Scientist", "Pour la Science" and "La Recherche".

Download Essay PDF File

Bookmark and Share



Uncle Al wrote on Sep. 26, 2009 @ 16:21 GMT
Lightspeed is negotiable via the Scharnhorst effect. Build a solid composed only of Casimir etalons, "Casimatter," with an alternating sector vacuum deposition rig. One sector continuously deposits 70 nm of aluminum (99% reflectance) onto a rotating ring, promptly covered by the next sector depositing 34 nm of 60:40 MgF2:LiF (thermal expansion mismatch of 0.1x10^(-6)/degree versus aluminum) transparent to 110 nm with refractive index 1.628. Round and round she goes. Cut out a section to obtain Casimatter, 37 wt-% zero point fluctuation-depleted fluoride alloy.

A paint can of finite volume and infinite surface area: sin(1/x) over (0,1] rotated about the x-axis. Filling is problematic absent paint originated in something infinitely smaller than atoms. Mathematics is not empirica, mathematics is not a science. Physics is limited by describing the observed universe. When mathematical hubris overwhelms empirical science, excrescences like string theory putrescently ooze into the world.

Bookmark and Share
report post as inappropriate


J.C.N. Smith wrote on Sep. 26, 2009 @ 20:13 GMT
Mr. Calude,

Thank you for an interesting essay.

I'd like to point out, however, that Zeno's Achilles paradox is an artifact of a common misperception about the fundamental nature of time. I believe it can be successfully argued that what traditionally has been thought of and referred to as "the flow of time" is, in reality, nothing more and nothing less than the evolution of the physical universe. The race between Achilles and the turtle comprises but a small portion of that evolution. There simply is no "time" which is separate and distinct from the evolving configurations of the universe. Once this is recognized, the paradox vanishes. A fuller explanation and justification for this assertion may be found here. Some additional consequences of this idea may be found in the essay which I've submitted to this FQXi competition. I'd of course welcome your thoughts and comments on it.

Bookmark and Share
report post as inappropriate


Florin Moldoveanu wrote on Sep. 26, 2009 @ 22:10 GMT
Cristian,

I do not understand your statements:

"Of course, for the sake of principle, everybody is free to choose other “limiting speeds,” thereby implicitly sacrificing the form invariant representation of the equations of motion in inertial frames dominated and stabilised by electromagnetic interactions. In this way it would also not be difficult to adopt special relativity to findings of higher signalling and travel speeds than the velocity of light in vacuum."

Do you mean to say that traveling at speeds higher than the speed of light is possible?

Bookmark and Share
report post as inappropriate


Don Limuti (www.zenophysics.com) wrote on Sep. 28, 2009 @ 20:01 GMT
Cristian,

I like this thought provoking essay. Here is some more support for imagination and fantasy.

1. All our physical theories are based upon making measurements of the "universal" constants of nature. These include the gravitational constant G, Planck constant h, and the speed of light c.

2. These constants are only only known via measurement. We would like them to be true constants but they come with no guarantees about being constant. The best we can do is to continue making measurements to the best accuracy we can attain. [In my opinion the recent making the constant c a fixed number by definition is unfortunate. Now, it seems that we no longer need to measure this speed c because we know it by definition. This violates the spirit of science.]

3. The discovery and measurement of all the fundamental constants were made by "geniuses" who used imagination and fantasy as two of their tools. The constants we have today may not be as accurate as we think, and there are others that are yet to be undiscovered.

4. And thus what is possible is based upon imagination and fantasy.

Good Luck,

Don L.

Bookmark and Share
report post as inappropriate


Cris Calude and Karl Svozil wrote on Sep. 29, 2009 @ 18:29 GMT
Thank you all for your comments and questions. Here are some [partial] responses.

Uncle Al has referred to the Scharnhorst effect, which we mentioned by stating the possibility of a quantum field theoretic "index of refraction smaller than unity;" for a discussion about its feasibility, see also P. W. Milonni and K. Svozil, "Impossibility of measuring faster-than-light signaling by the Scharnhorst effect", Phys. Lett. B 248, 437-438 (1990), DOI:10.1016/0370-2693(90)90317-Y. This is only one conceivable possibility, among others, which might eventually push the speed of travel and communication beyond the speed of light barrier.

Florin Moldoveanu asked if we mean to say that traveling at speeds higher than the speed of light is possible. Here we mainly wanted to point out that Lorentz-type transformations follow from the assumption of the constancy of some "limiting speed;" be it light or another velocity. So far, there are no physical indications that we should assume limiting speeds greater than the velocity of light, but if these would be detected, relativity theory could be easily adopted to this new situation.

Don Limuti mentions that fixing the velocity of light c might be unfortunate. Indeed, as Asher Peres in Nature 312, 10 (1984) doi:10.1038/312010b0 pointed out, this leaves us with the issue of a possible frame (in)variance of the meter, and of length scales in general. As for now, there appears to be no problem with this issue; but as Petley & W.R.C. Rowley in Nature 312, 490 (1984) doi:10.1038/312490a0 point out, one could pragmatically change the definition of length, for example, should anisotropies of the velocity of light be detected experimentally.

Bookmark and Share
report post as inappropriate


Eckard Blumschein wrote on Sep. 30, 2009 @ 14:06 GMT
Uncle Al,

While I did not manage to find your words excrescences and putrescently in my English Learner's Dictionary, I perhaps nonetheless correctly understood that you do not like mathematical hubris. Do you nonetheless accept mathematics as rigorously founded? If so, why? Are the votes for ultimate realism in physics given here not possibly correct?

Eckard Blumschein

Bookmark and Share
report post as inappropriate


Cristinel Stoica wrote on Oct. 3, 2009 @ 06:19 GMT
Dear Professor Calude and Professor Svozil,

I like your essay, which is novel and creative, and on topic. I consider Professor's Calude book on constructive mathematics very good. I have some comments and questions about your essay.

The speed of light-based Lorentz invariance seems to be more than simply a convention suggested by Maxwell's equations. It is also related to the proper...

view entire post


Bookmark and Share
report post as inappropriate


Cris Calude and Karl Svozil wrote on Oct. 4, 2009 @ 19:52 GMT
Dear Mr Stoica,

Thank you for your comments and questions.

- If the algorithm just switches a bool variable at each step, what value will the variable have after T?

No, you cannot do this because of paradoxes like Thomson's lamp. We have two procedures describing what is the function computed by an accelerated Turing machine. See C.S.Calude and L. Staiger, A Note on Accelerated Turing Machines, CDMTCS Research Report 350, www.cs.auckland.ac.nz/CDMTCS/researchreports/350cris.pdf .

- Do you think we could use such a machine to provide a finite length derivation of the axiom of choice, and of the continuum hypothesis, from Zermelo-Frankel's axioms?

No, because both these axioms have been proved to be independent of ZF (by Goedel and Cohen).

Good luck for your essay!

Bookmark and Share
report post as inappropriate


Cristinel Stoica wrote on Oct. 5, 2009 @ 05:09 GMT
Dear Professor Calude and Professor Svozil,

Thank you for your answers. I made a typo in my previous comment, which makes my question silly, and now I see it. It was my purpose to ask

"Do you think we could use such a machine to provide an infinite length derivation of the axiom of choice, and of the continuum hypothesis, from Zermelo-Frankel's axioms?" (or, of course, of their negations)

Of course I am aware of Godel's and Cohen's results, but I was thinking about infinite length proofs. We can choose one element of each set, in an infinite number of steps, at least for the case when we have a countable number of sets. The Zeno-Turing machine expands the possibilities related to the axiom of choice.

Best regards,

Cristi

Bookmark and Share
report post as inappropriate


Nick Mann wrote on Oct. 13, 2009 @ 16:22 GMT
Drs. Calude and Svozil,

You are by any standard two of the most interesting and useful active scientists around, up there along with Brukner and Zeilinger, Chaitin, Gisin, Suarez. I became hooked on Svozil years ago when I first read "Undecidability Everywhere?" in the Casti and Karlqvist collection, and it has only gotten better. Dr. Calude has not merely, among much else, computed 64 digits of an Omega and afforded the world a glimpse of randomness, but, with the excellent Mike Stay, also given us (nearly most recently) "From Heisenberg to Gödel via Chaitin". This is the cutting edge.

But for me this paper is a disappointment. I can almost see you guys (figuratively) sitting down at the kitchen table with a six pack and saying, "Okay, let's win this contest. What do you think they want?" and then giving it to them.

Bookmark and Share
report post as inappropriate


George Schoenfelder wrote on Oct. 14, 2009 @ 20:36 GMT
Dear Cristian and Karl,

I much enjoyed your essay in particular modeling using Turing state machines.

In my FQXi essay I suggest a computer model of the universe with atomic systems being bimodal Turing machines which alternate between modes. One mode conducts classical computation and the other mode quantum computation as a network. Have you or to your knowledge anyone else thought along those lines?

Sincerely,

George Schoenfelder

Bookmark and Share
report post as inappropriate


Cris Calude and Karl Svozil wrote on Oct. 17, 2009 @ 07:50 GMT
Thanks for your new comments.

Cristinel Stoica: Unfortunately we don't know the answer to your interesting question. ATMs can be useful for mathematics: with an ATM having no more than 5000 bits one can solve the Riemann Hypothesis or prove the Four Colour Theorem.

Nick Mann: Thank you for your nice (hardly deserved) comments about us and please accept our apology for disappointing you. Can you elaborate?

You have been almost right in your guess: we have started thinking about this essay at a table, not in a kitchen, but in a small restaurant in Vienna woods. We assume that anybody submitting an essay wishes to win, but this is hardly the point: it's more important to take this opportunity to share some ideas with an interested community.

George Schoenfelder: We haven't seen any elaboration of the ideas in your essay, but, of course, our knowledge is quite limited.

Bookmark and Share
report post as inappropriate


Nick Mann wrote on Oct. 17, 2009 @ 17:01 GMT
CC and KS,

Thanks for your thanks. But don't be modest. Your output is abnormally interesting. Dr. Svozil's obvious cultural reach helps a lot in his case. Quantum Artaud. White noise, Nature-Beauty and garden gnomes. One sits up, pays attention.

My kitchen table image may have been influenced by the story of GC, KS and AZ inventing the Quantum Omega in a coffee shop and I believe I toyed momentarily with that more elegant setting before my innate vulgarity took over.

What bothered me about this paper was the gee whiz tenor of (paraphrasing here) "This may (could, might) actually happen!" to which my automatic response was, "No, it actually may not." I know that KS has played around, fascinatingly, with similar material before (in the computational worlds paper, for example) but done so with, well, more restraint. Okay, to avoid getting into the highly technical issue of computational oracles -- which I don't claim I'm especially qualified to do anyway -- here's a collateral example.

You start right out with: "Nuclear science has made true the ancient alchemic dream of producing gold from other elements such as mercury through nuclear reactions." Putting aside the somewhat operatic quality of this, one has to say, well, yes and no. Actually the ancient alchemic dream, although of course they didn't realize it back then, was to become rich by getting around what today we're familiar with as the Second Law of Thermodynamics. I've never seen the monthly electric bill for a collider, but I'm willing to bet modern transmutation is a seriously unprofitable and entropy-producing enterprise and will always be unprofitable and seriously entropy-producing even if Dan Nocera and his MIT team succeed -- pray that they do -- in making comparatively cheap energy available via artificial photosynthesis. Just saw this:

"This historic anecdotal evidence suggests that what is considered tractable, operational and feasible depends on time. One could even extend speculations to the point where everything that is imaginable is also feasible."

Sure you can. In one of its forms it's called science fiction. You strap on your antigravitation pack and float off to work. But limits, gentlemen, limits. Even turning undecidability against itself in a cool judo move must discover a limit. Boundaries, barriers. As for re-programming the universe ...

Bookmark and Share
report post as inappropriate


Cris Calude and Karl Svozil wrote on Oct. 20, 2009 @ 19:48 GMT
Nick Mann: thanks for your explanation.

"But limits, gentlemen, limits. Even turning undecidability against itself in a cool judo move must discover a limit. Boundaries, barriers. As for re-programming the universe ... "

That's the point: limits are not forever.

Bookmark and Share
report post as inappropriate


Narendra Nath wrote on Oct. 23, 2009 @ 06:40 GMT
It is indeed a joy to go through the freshness of your approach and a widening of landscape you have provided. I for one believe in an open approach, free from biases based on ' what we call established theories '. There is nothing in Physics yet that can be called the final truth. We simple work towards better and better relative truths. it is quite possible to have a sudden revision in our...

view entire post


Bookmark and Share
report post as inappropriate


NN wrote on Oct. 30, 2009 @ 03:55 GMT
Sorry for the long comments that i have put on your nice essay. perhaps you find it hard to respond o/c shortage of time. Otherwise, i would love to have the wisdom of your responnse in view of your inspiring essay.

Bookmark and Share
report post as inappropriate


Jayakar Johnson Joseph wrote on Oct. 30, 2009 @ 15:54 GMT
Dear Cristian S. Calude,

As quantum indeterminacy evolves from complementarity, the multi-field interactions of travelling wave in a spin matrix may have similarities with the phenomenology of neutrino oscillations. As the relative unit of refractive index is not absolute, there is probability of superluminal speed of travel in adaptations with neutrino oscillations.

In context with the causally of consequence of collision, I think all matters are conjugated cluster-matters with a coherent and an incoherent cluster-matters that are synchronized in rotations as gear wheels. When there is collision of such conjugated cluster-matters, there is disjunction and re-conjugation with different counter parts at the detectors that observer; in that the actions are representational by correlation variables in incidence geometry. In this case indeterminism from randomness is transformational by correlation probabilities, in that the quantum numbers and unitary transformations are valid. This case differ as it requires more sensor purity in that a domain of negative sensing neighbourhood is much importance for source sensing rather than correlating all observables for an event. If there are deterministic observables, then there is phenomenological probability describable for travel through wormholes, may be from sphere to sphere surfaces rather than from open to open surfaces.

With this, Turing is more appropriate rather than time travel, in that it defines functions for multiple interactions on travel as neutrino oscillations and this indeed, 'reprogramming to observe universe' rather than 'reprogramming of the universe'; it's good, thanking you ..

With best wishes,

Jayakar

Bookmark and Share
report post as inappropriate


ben wrote on Aug. 19, 2011 @ 07:02 GMT
Apple iphone: http://www.happytesco.com/mobile-phones-apple-iphone-c-93_96
.html

Mobile phone: http://www.happytesco.com/mobile-phones-c-93.html

3D LED TV: http://www.happytesco.com/3d-led-tv-c-94.html

Iphone 4: http://www.happytesco.com/apple-iphone-4-16gb-black-p-227.ht
ml

First month, fifth day of the God of Wealth , folk customs .

Rich legend of the Song Cai Jing 's birthday for the fifth day of the first month Apple iPhone 4, CAI has been regarded as the God of Wealth . Cai Jing was later demoted , replaced Zhao Xuantan Wealth , family name last name iPhone 4 for the Song emperor . Mobile phone In addition to respect for the civil Zhao Xuantan is the God of Wealth , there are partial Wealth Another HTC legend is Xuantan to Zhao Gongming , recorded in the Gods , BlackBerry phone has been called is a Xuantan Marshal .

Expressed 3D LED TV in the South Rd to the Samsung 3D LED TV fifth day God is in all aspects of the Old and the God of Wealth . So LG 3D LED TV some friends asked me , which direction should SONY 3D LED TV be to meet the God of Wealth , according to this legend , which direction can be .

Chinese nation is a long history , culture, most inclusive nation , so the legend of the God of Wealth is also Panasonic 3D LED TV very rich. Previous article we introduced the Buddhist treasure king . Apple iPhone 4 16GB White

In Buddhism , there are many ways related to the God of Wealth .

the saying goes , Apple iPhone 4 32GB White the spring . In the beginning of the spring to meet the God of Wealth , said that efforts have to start the year . The custom of welcoming the God of Wealth expression industrious and talented people to Apple iPhone 3 32GB White work with the new year and informed decision-making in exchange for the good wishes of a happy life .

Bookmark and Share
report post as inappropriate


Login or create account to post reply or comment.

Please enter your e-mail address:
Note: Joining the FQXi mailing list does not give you a login account or constitute membership in the organization.