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.

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

Current Essay Contest

Previous Contests

**Undecidability, Uncomputability, and Unpredictability Essay Contest**

*December 24, 2019 - April 24, 2020*

Contest Partners: Fetzer Franklin Fund, and The Peter and Patricia Gruber Foundation

read/discuss • winners

**What Is “Fundamental”**

*October 28, 2017 to January 22, 2018*

*Sponsored by the Fetzer Franklin Fund and The Peter & Patricia Gruber Foundation*

read/discuss • winners

**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/discuss • winners

**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/discuss • winners

**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/discuss • winners

**It From Bit or Bit From It**

*March 25 - June 28, 2013*

*Contest Partners: The Gruber Foundation, J. Templeton Foundation, and Scientific American*

read/discuss • winners

**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/discuss • winners

**Is Reality Digital or Analog?**

*November 2010 - February 2011*

*Contest Partners: The Peter and Patricia Gruber Foundation and Scientific American*

read/discuss • winners

**What's Ultimately Possible in Physics?**

*May - October 2009*

*Contest Partners: Astrid and Bruce McWilliams*

read/discuss • winners

**The Nature of Time**

*August - December 2008*

read/discuss • winners

Current Essay Contest

Previous Contests

Contest Partners: Fetzer Franklin Fund, and The Peter and Patricia Gruber Foundation

read/discuss • winners

read/discuss • winners

How can mindless mathematical laws give rise to aims and intention?

Contest Partner: The Peter and Patricia Gruber Fund.

read/discuss • winners

Media Partner: Scientific American

read/discuss • winners

read/discuss • winners

read/discuss • winners

Which of Our Basic Physical Assumptions Are Wrong?

read/discuss • winners

read/discuss • winners

read/discuss • winners

read/discuss • winners

Forum Home

Introduction

Terms of Use

RSS feed | RSS help

Introduction

Terms of Use

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

RSS feed | RSS help

RECENT POSTS IN THIS TOPIC

**S. Baron**: *on* 12/10/08 at 1:02am UTC, wrote I enjoyed your essay very much. One quibble, if geometry reacts to matter...

**F. Le Rouge**: *on* 12/4/08 at 9:19am UTC, wrote I do agree with you about the 'split' between Geometry and real Universe...

**Michael Silberstein**: *on* 12/4/08 at 1:12am UTC, wrote Hi Olaf, Great essay. My question is really for both you and Fontini in...

**Mark Stuckey**: *on* 12/3/08 at 1:52am UTC, wrote Dear Olaf, There are similarities in our approaches, in fact, a reference...

**Ken Sasaki.**: *on* 12/2/08 at 22:37pm UTC, wrote Dear Dr. Dreyer: I have just read your very interesting essay; and it...

**Olaf Dreyer**: *on* 12/2/08 at 14:34pm UTC, wrote **Essay Abstract** Attempts to quantize general relativity encounter an...

RECENT FORUM POSTS

**Balybin Urievich**: "As for me, teaching the younger generation is one of the main tasks of..."
*in* The Present State of...

**John Cox**: "Okay. In Topology, all points on a sphere are vector positions and..."
*in* The Quantum Identity...

**Vending Ways**: "Vending Ways is a UAE-based leading distributor of Coin Operated Washing..."
*in* MCQST2021 | The universe...

**Steve Dufourny**: "David Bohm developed a method for comcrete dialogues rather than debates..."
*in* Global Collaboration

**Steve Dufourny**: "One of the problems is the difficulty to unite and convice. The majority..."
*in* Global Collaboration

**Thomas Ray**: "Kobi, You write as if information accumulates like physical grains of sand..."
*in* Mathematical Models of...

**Thomas Ray**: "Nicholas, Indeed. This sums up pretty much what I had in mind when I..."
*in* Mathematical Models of...

**Thomas Ray**: "I think of it this way: Just as the quality "color" is known not by the..."
*in* The Quantum Identity...

RECENT ARTICLES

*click titles to read articles*

**The Math of Consciousness: Q&A with Kobi Kremnitzer**

A meditating mathematician is developing a theory of conscious experience to help understand the boundary between the quantum and classical world.

**Can We Feel What It’s Like to Be Quantum?**

Underground experiments in the heart of the Italian mountains are testing the links between consciousness and collapse theories of quantum physics.

**The Thermodynamic Limits of Intelligence: Q&A with David Wolpert**

Calculating the energy needed to acquire and compute information could help explain the (in)efficiency of human brains and guide the search for extra-terrestrial intelligence.

**Gambling Against the Second Law**

Using precision thermometry to make mini heat engines, that might, momentarily, bust through the thermodynamic limit.

**Mind and Machine: What Does It Mean to Be Sentient?**

Using neural networks to test definitions of 'autonomy.'

RECENT FORUM POSTS

RECENT ARTICLES

A meditating mathematician is developing a theory of conscious experience to help understand the boundary between the quantum and classical world.

Underground experiments in the heart of the Italian mountains are testing the links between consciousness and collapse theories of quantum physics.

Calculating the energy needed to acquire and compute information could help explain the (in)efficiency of human brains and guide the search for extra-terrestrial intelligence.

Using precision thermometry to make mini heat engines, that might, momentarily, bust through the thermodynamic limit.

Using neural networks to test definitions of 'autonomy.'

FQXi FORUM

May 21, 2022

CATEGORY:
The Nature of Time Essay Contest (2008)
[back]

TOPIC: Time is not the problem. by Olaf Dreyer [refresh]

TOPIC: Time is not the problem. by Olaf Dreyer [refresh]

Attempts to quantize general relativity encounter an odd problem. The Hamiltonian that normally generates time evolution vanishes in the case of general relativity as a result of diffeomorphism invariance. The theory seems to be saying that time does not exist. The most obvious feature of our world, namely that time seems to progress and that the world changes accordingly becomes a problem in this presumably fundamental theory. This is called the problem of time. In this essay we argue that this problem is the result of an unphysical idealization. We are caught in this ``problem of time'' trap because we took a wrong turn in the early days of relativity by permanently including a split of geometry and matter into our physical theories. We show that another possibility exists that circumvents the problem of time and also sheds new light on other problems like the cosmological constant problem and the horizon problem in early universe cosmology.

Olaf Dreyer's research focuses on novel approaches to quantum gravity and the foundations of quantum theory. He obtained a Ph.D. in quantum gravity from Pennsylvania State University and he held a postdoctoral position at the Perimeter Institute for Theoretical Physics and a Marie Curie fellowship at Imperial College of Science, Technology, and Medicine. He is currently a postdoctoral fellow at MIT.

Dear Dr. Dreyer:

I have just read your very interesting essay; and it seems to me that, since your internal relativity recognizes a "Newtonian"-like background time, it would dispense with many problems of time, because time has a definite direction. Each space-time point would be in exactly one hypersurface of simultaneity and each world line would intersect each hypersurface exactly once...

view entire post

I have just read your very interesting essay; and it seems to me that, since your internal relativity recognizes a "Newtonian"-like background time, it would dispense with many problems of time, because time has a definite direction. Each space-time point would be in exactly one hypersurface of simultaneity and each world line would intersect each hypersurface exactly once...

view entire post

Dear Olaf,

There are similarities in our approaches, in fact, a reference to your work was removed only on the last cut in trying to get our essay down to 5000 words :-)

You don't mention it, but your approach would seem to account for Novikov's self-consistency conjecture for GR, identifying paradoxes such as Polchinski's as "the consequence of an unphysical idealization: namely that of geometry without matter." Or does this reflect a misunderstanding of your idea?

Also, I'm wondering if your "pre-causal phase," which is responsible for solving the horizon problem, might somehow be relevant for explaining QM non-locality? Or, does this pre-causal phase only exist at high energies?

Great essay, Olaf. I think I've found another worth my vote!

Mark

There are similarities in our approaches, in fact, a reference to your work was removed only on the last cut in trying to get our essay down to 5000 words :-)

You don't mention it, but your approach would seem to account for Novikov's self-consistency conjecture for GR, identifying paradoxes such as Polchinski's as "the consequence of an unphysical idealization: namely that of geometry without matter." Or does this reflect a misunderstanding of your idea?

Also, I'm wondering if your "pre-causal phase," which is responsible for solving the horizon problem, might somehow be relevant for explaining QM non-locality? Or, does this pre-causal phase only exist at high energies?

Great essay, Olaf. I think I've found another worth my vote!

Mark

Hi Olaf,

Great essay. My question is really for both you and Fontini in that you both begin with a pre-geometric base, the rejection of the dualism between geometry and matter and a Lorentzian take on GR (and thus SR). Question one: while you both get out of the problem of time (Wheeler-DeWitt), do you think that the Lorentz interpretation is sufficient to get out of the blockworld (BW)implication of the relativity of simultaneity? That is, do you think the Lorentz interpretation somehow yields a preferred frame at the level of spacetime itself? Of course Wheeler-DeWitt is more radically timeless than the BW of M4, but I'm curious if you are additionally alleging not only to recover GR or M4 from your pre-geometric base but also a preferred frame that negates BW? If so, how does this story go and does the preferred frame map onto the experience of the present moment in some way? Question two: am I right in thinking that at bottom you both have Causality and/or a pre-geometric analogue of a preferred frame? I gather this is the norm, but why isn't this considered cheating? Is it surprising that one recovers SR if one starts with Causality?

Part of the reason I ask these questions is that we also have a pre-geometric base that negates the dualism between geometry and matter but by contrast we begin with a discrete graph theoretic approach {a discrete path integral formalism, though we don't interpret it as path integrals as such} and we recover the entire BW of spacetime. That is, our pre-geometric account isn't dynamical at all (and we assume neither Causality or a preferred frame)and what we recover is the BW. We started with a time-symmetric (acausal and adynamical) interpretation of QM called the relational blockworld and worked backwards to QG so we have a solid story about recovering QM from our pre-geometric base. In any case, I'm hoping you guys will look at our essay (see below) and offer comments as there is much to discuss in our similarities and differences.

Cheers,

Michael

http://fqxi.org/data/essay-contest

-files/Stuckey_Stuckey_Silberstein.pdf

Great essay. My question is really for both you and Fontini in that you both begin with a pre-geometric base, the rejection of the dualism between geometry and matter and a Lorentzian take on GR (and thus SR). Question one: while you both get out of the problem of time (Wheeler-DeWitt), do you think that the Lorentz interpretation is sufficient to get out of the blockworld (BW)implication of the relativity of simultaneity? That is, do you think the Lorentz interpretation somehow yields a preferred frame at the level of spacetime itself? Of course Wheeler-DeWitt is more radically timeless than the BW of M4, but I'm curious if you are additionally alleging not only to recover GR or M4 from your pre-geometric base but also a preferred frame that negates BW? If so, how does this story go and does the preferred frame map onto the experience of the present moment in some way? Question two: am I right in thinking that at bottom you both have Causality and/or a pre-geometric analogue of a preferred frame? I gather this is the norm, but why isn't this considered cheating? Is it surprising that one recovers SR if one starts with Causality?

Part of the reason I ask these questions is that we also have a pre-geometric base that negates the dualism between geometry and matter but by contrast we begin with a discrete graph theoretic approach {a discrete path integral formalism, though we don't interpret it as path integrals as such} and we recover the entire BW of spacetime. That is, our pre-geometric account isn't dynamical at all (and we assume neither Causality or a preferred frame)and what we recover is the BW. We started with a time-symmetric (acausal and adynamical) interpretation of QM called the relational blockworld and worked backwards to QG so we have a solid story about recovering QM from our pre-geometric base. In any case, I'm hoping you guys will look at our essay (see below) and offer comments as there is much to discuss in our similarities and differences.

Cheers,

Michael

http://fqxi.org/data/essay-contest

-files/Stuckey_Stuckey_Silberstein.pdf

I do agree with you about the 'split' between Geometry and real Universe that drives in my opinion to build a fake Universe with computers; 'Superstring theory' is the best example of this virtual world. I am pointing this in my own essay ('Square Wheels or Real Dynamics?').

BUT, contrarily to you I would not say that the Theory does seem to abolish Time. This theory is either abolishing Time OR Space: one can make it say what one want. Due to my French culture, it is more creating a fake conventional Time than abolishing it. I mean that Einstein's theories are grounding a kind of Time-religion.

My statement is therefore that the split is in Quanta Physics as much as in Einstein's theory. The 'Wave idea' in particle's Physics is 'the theory seen as part of reality'. 'Dualism' and paradoxes are coming from this.

(One can notice that even on a theoretical level, 'General Relativity' of Einstein was destroyed by H. Poincaré himself who does explain that there is a split between the conclusion of GR and its postulate.)

BUT, contrarily to you I would not say that the Theory does seem to abolish Time. This theory is either abolishing Time OR Space: one can make it say what one want. Due to my French culture, it is more creating a fake conventional Time than abolishing it. I mean that Einstein's theories are grounding a kind of Time-religion.

My statement is therefore that the split is in Quanta Physics as much as in Einstein's theory. The 'Wave idea' in particle's Physics is 'the theory seen as part of reality'. 'Dualism' and paradoxes are coming from this.

(One can notice that even on a theoretical level, 'General Relativity' of Einstein was destroyed by H. Poincaré himself who does explain that there is a split between the conclusion of GR and its postulate.)

I enjoyed your essay very much. One quibble, if geometry reacts to matter that does not necessarily mean it "evolved in the absence of matter". Geometry could have evolved from matter AND react to matter. Think of evolution. The environment affects the genome which then affects the environment.

By geometry do you mean space-time?

Thank-you,

Sandy

By geometry do you mean space-time?

Thank-you,

Sandy

Login or create account to post reply or comment.