The Nature of the Universe, Time Travel and More...

[Asbo Zaprudder]

A view that seemed to be shared to a degree by John Archibald Wheeler and Max Planck. I need to look into the QBism interpretation, but I suspect that consciousness or mental states are fundamental and reality is emergent.

There's an article on Quantum Baysianism (QBism) in this week's New Scientist, but unfortunately, it's behind a paywall.

Forget the multiverse. In the pluriverse, we create reality together

A radical idea that resolves many quantum paradoxes suggests there is no objective view of reality. How can the cosmos be stitched together from interlocking perspectives?

www.newscientist.com

There is a book by Jo Marchant about the notion:

In Search of Now: The Science and Mystery of the Present Moment: Amazon.co.uk: Marchant, Jo: 9781838858735: Books

Buy In Search of Now: The Science and Mystery of the Present Moment Main by Marchant, Jo (ISBN: 9781838858735) from Amazon's Book Store. Everyday low prices and free delivery on eligible orders.

www.amazon.co.uk

 

[camdudetenger2018]

do you guys think the time travel theory from the avengers 4 aka avengers endgame is true

or the most common in tv shows and movies time travel theory is true

 

[Asbo Zaprudder]

do you guys think the time travel theory from the avengers 4 aka avengers endgame is true

or the most common in tv shows and movies time travel theory is true

No and no. No, I don't think they are true, but neither do I think they are false. They are not theories nor are they hypotheses. Have they been published in academic journals after peer review? Plot devices in popular fiction are not science. Perhaps research the scientific method. Ideally, science is not a matter of belief, but we are human and fallible.

 

[camdudetenger2018]

No and no. No, I don't think they are true, but neither do I think they are false. They are not theories nor are they hypotheses. Have they been published in academic journals after peer review? Plot devices in popular fiction are not science. Perhaps research the scientific method. Ideally, science is not a matter of belief, but we are human and fallible.

oh ok lol althought the wonders of time travel has been to me in my opinion a mystery

as in what happens if we time travel to the past does it change the present or is it like the avengers endgame style where you time travel to the past does it create a new alternate earth after you change the past

 

[Asbo Zaprudder]

oh ok lol althought the wonders of time travel has been to me in my opinion a mystery

as in what happens if we time travel to the past does it change the present or is it like the avengers endgame style where you time travel to the past does it create a new alternate earth after you change the past

In Special Relativity, the past, present and future are fixed. If time travel happens, it always did happen and always will happen.

This is inconsistent with Quantum Mechanics where reality is not realised until it is interacted with - whether one calls that entanglement, observation or measurement.

Quantum Mechanics is also incompatible with General Relativity. If the state of a particle is indeterminate until observed, how do we represent its gravitational field?

The answer to your question is we just don't know. We have no theory that successfully unifies these descriptions.

Stephen Hawking suggested that time travel is forbidden by the unifying law. David Deutsch suggests that time travel transports one to another version of reality in a parallel universe. Other people suggest that while an instance of consciousness might effectively experience a personal reality, this is an illusion constructed from correlated mental states that might be no more than possible states of a timeless quantum realm. Variations exist of these and other suggestions. How one falsifies any of these hypotheses is beyond me.

If there is only one universe, travelling to its past creates the potential for paradoxes and destroying causality. It contradicts the law of conservation of energy and breaks time symmetry. One could create a time loop and have the same mass-energy present so many times that it would generate a black hole. Besides that and winning a potentially unlimited amount of money, there are probably all sorts of other shenanigans that one could pull.

 

[publiusr]

Perhaps time flow on the quantum level is more amenable to change:

New controls can stretch, blur and even reverse quantum time flow

In new research published in Physical Review X, scientists have designed quantum control protocols that generate processes more consistent with time flowing backward than forward. The protocols—techniques to control quantum systems—modify a quantum system's "arrow of time," the concept of time...

phys.org

Gravitational waves can supposedly leave an imprint upon light:

Gravitational waves leave imprints on light emitted by atoms, theoretical study predicts

Gravitational waves are ripples in spacetime produced by violent cosmic events, such as the merging of black holes. So far, direct detections have relied on measuring tiny distance changes over kilometer-scale instruments. In a new theoretical study published in Physical Review Letters...

phys.org

We know that light can bend, such that solar foci telescopes may be possible.

More on superconductivity

Opening a new window into superconductivity by reimagining a classic tool

For more than a century, condensed matter physics has grappled with one of its greatest unsolved challenges: how to build superconductors that operate at room temperature and transmit electricity with no loss. Now, in a paper published in Nature, a team of Harvard physicists has reported new...

phys.org

 

[Will The Serious]

This is inconsistent with Quantum Mechanics where reality is not realised until it is interacted with - whether one calls that entanglement, observation or measurement.

Time travel in the quantum realm is like opening the box to see whether Schrodinger's Cat is alive or dead. Finding the cat dead you then close the box in the hope that when you open it again, the dead cat will now be alive. The past represents an observed quantum state.

Can a quantum state be unobserved? I've heard it said that destroying the records of an observation can change the results of the observations, but I would thing you would have to be completely thorough in the destruction of those record to the point that no one would ever know the answer to whether or not the second observation was different from the first.

-Will

 

[Asbo Zaprudder]

Time travel in the quantum realm is like opening the box to see whether Schrodinger's Cat is alive or dead. Finding the cat dead you then close the box in the hope that when you open it again, the dead cat will now be alive. The past represents an observed quantum state.

Sabine did a video on this topic:

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She posits that the unpredictability applies to the past as well.

Can a quantum state be unobserved? I've heard it said that destroying the records of an observation can change the results of the observations, but I would thing you would have to be completely thorough in the destruction of those record to the point that no one would ever know the answer to whether or not the second observation was different from the first.

No-hiding theorem - Wikipedia

en.wikipedia.org

Interaction-free measurement - Wikipedia

en.wikipedia.org

Elitzur–Vaidman bomb tester - Wikipedia

en.wikipedia.org

 

[camdudetenger2018]

In Special Relativity, the past, present and future are fixed. If time travel happens, it always did happen and always will happen.

This is inconsistent with Quantum Mechanics where reality is not realised until it is interacted with - whether one calls that entanglement, observation or measurement.

Quantum Mechanics is also incompatible with General Relativity. If the state of a particle is indeterminate until observed, how do we represent its gravitational field?

The answer to your question is we just don't know. We have no theory that successfully unifies these descriptions.

Stephen Hawking suggested that time travel is forbidden by the unifying law. David Deutsch suggests that time travel transports one to another version of reality in a parallel universe. Other people suggest that while an instance of consciousness might effectively experience a personal reality, this is an illusion constructed from correlated mental states that might be no more than possible states of a timeless quantum realm. Variations exist of these and other suggestions. How one falsifies any of these hypotheses is beyond me.

If there is only one universe, travelling to its past creates the potential for paradoxes and destroying causality. It contradicts the law of conservation of energy and breaks time symmetry. One could create a time loop and have the same mass-energy present so many times that it would generate a black hole. Besides that and winning a potentially unlimited amount of money, there are probably all sorts of other shenanigans that one could pull.

oh ok

 

[Asbo Zaprudder]

oh ok

This video from Sabine might be more entertaining if not enlightening:

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[Kamen Rider Blade]

Spoiler: Isaac Arthur - Micro Planets： Building Artificial Worlds with Black Hole Cores

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What a interesting idea for a artificial (Space Habitat / Mini Mega Structure / Artificial World).

Given that scientists think there are estimated to be 100 million or more Black Holes within our Galaxy alone, I'm sure somebody can find a perfectly sized one to make a Micro Planet around the Black Hole as it's core.

This isn't even counting the Rogue Black Holes roaming around within our Galaxy.

Just imagine making a Small World after all!
One with the right amount of surface area
Near Limitless Power Core.
You can invite only the people you like to live with you

A Glorified City State in the shape of a Small Planet.

 

[Kamen Rider Blade]

Spoiler: Sabine HossenFelder - AI Might Actually Save Science. Here’s Why.

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Apparently, one of the ways to deal with AI flood of 'Junk Science Papers' is to raise Publishing fees.

@Asbo Zaprudder
What do you think the minimum Publishing fee would need to be to prevent flooding by all those who would try to 'Cheat the System' by using AI to write their papers?

I'd say a minimum of $1,000 USD to $10,000 USD as a minimum would make people think before Publishing.

This isn't even counting the Subscription Fees to Reading Access.

 

[Asbo Zaprudder]

Spoiler: Sabine HossenFelder - AI Might Actually Save Science. Here’s Why.

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Apparently, one of the ways to deal with AI flood of 'Junk Science Papers' is to raise Publishing fees.

@Asbo Zaprudder
What do you think the minimum Publishing fee would need to be to prevent flooding by all those who would try to 'Cheat the System' by using AI to write their papers?

I'd say a minimum of $1,000 USD to $10,000 USD as a minimum would make people think before Publishing.

This isn't even counting the Subscription Fees to Reading Access.

$1,000 sounds reasonable, although you'd need to adjust it for the relative wealth of the country from which the paper originates. I doubt peer review has improved. Perhaps AI can help with that as well. There were enough bad papers before AI came along. I didn't watch the video by the way as I gave up on academia nearly 40 years ago.

 

[Candleicious Ghost]

OK I thought this was really cool but the FIA banned it

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[Osol Twist]

^never knew flywheel is ancient technology!

 

[Candleicious Ghost]

^never knew flywheel is ancient technology!

flywheels are one of the oldest, how do you think potters wheels work?

 

[Osol Twist]

hehe i didn't think about potters wheel at all, never have really=)

 

[Candleicious Ghost]

hehe i didn't think about potters wheel at all, never have really=)

Back in the early 70s I had one of those "boys story books" that had short stories and stuff supposedly all for boys and one of the short stories was about a flywheel car, and I've always wondered since then if such a thing could be done for real. Turns out the idea has been tried as in the video below.

Here is a video about flywheel powered vehicles

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[Santaman]

Flywheels are used a lot in spacecraft actually.

Reaction wheel - Wikipedia

en.wikipedia.org

Control moment gyroscope - Wikipedia

en.wikipedia.org

Without these sort of things spacecraft would just tumble around, thrusters are also an option but these use fuel.
Disadvantage is that they have moving parts and that's a hassle when it comes to maintenance and replacements.

A magnetic option is also there if you happen to have a large magnetic field near like a planet, these don't have moving parts so they're very reliable

Magnetorquer - Wikipedia

en.wikipedia.org

 

[Osol Twist]

Turns out the idea has been tried as in the video below.

agh... the video is inaccessible to me

Flywheels are used a lot in spacecraft actually.

That makes total sense