https://tilvids.com/w/27JVYrbcf8iv33Yf8igYoN 2020 Oct 24

❛❛ This video is a clip from AlwaysAsking.com Episode 6: "Is There Life After Death?" ❜❜

 
#TimeTravel (#retrograde) is transporting anything into the #past: a #person, a #quantum #signal, a #thought.

Resulting from some combination of:
• #QuantumEntanglement
• #Wormholes
• #DarkEnergy & #DarkMatter
• #ManyWorlds & #Multiverse
• #Tachyons & faster-than-light (superluminal) #particles
• #Consciousness may involve quantum processes in the #brain
• Rotating cylinders or gyroscopes (after #HGWells)
• Higher #dimensional #geometries, folding or looping #SpaceTime
• & c …

Aton Petrov: Time Travel May Be Possible Without Major #Paradoxes

Short 12-min #video on the #cultural & #literary #history and #theoretical #physics of Time Travel. Thinking on the subject rapidly generates paradoxes of #mathematical #logic, which #Petrov says cannot exist.

https://www.youtube.com/watch?v=p2uWv02-BlA 02 May 2022
https://Wikipedia.org/wiki/Temporal_paradox

 
#Astrophysicist Matt O'Dowd for #PBS #SpaceTime:

…"we should keep trying to come up with tests [for #ManyWorlds #theory]. One #idea does exist which may allow us to actually send #messages between #worlds, assuming they exist [within] our splitting #quantum #SpaceTime"…

https://youtu.be/z-syaCoqkZA
https://PBS.org/video/where-are-the-worlds-in-many-worlds-vblkuh/
https://wikipedia.org/wiki/Matt_O%27Dowd_(astrophysicist)

At @KronoMoon, #signaling or #messaging is central to ideas of #TimeTravel.

 
"Does Many Worlds Explain Quantum Probabilities?"
#Australian #astrophysicist Matt O'Dowd for #PBS #SpaceTime

…"The problem is, that on the surface, the #ManyWorlds #Theory seems unverifiable. There's no way for us to ever interact with the other branches. But"…

https://youtu.be/BU8Lg_R2DL0
https://PBS.org/video/does-many-worlds-explain-quantum-probabilities-xxh5jt/
https://en.wikipedia.org/wiki/Matt_O%27Dowd_(astrophysicist)

I was reminded of some of our lunch conversations, @dgoldsmith, when watching this video! It quite elegant that the Born rule derives from many worlds so well.

I thought Dr O’Dowd did a really good job of explaining the concepts here, even to someone with limited physics background (like moi)

https://youtu.be/BU8Lg_R2DL0?si=_WpbfV_qsHAxEHVE

A deep dive into Wilco, especially “Cruel Country” (2022) and “Cousin” (2023). #111Words #Wilco #Hummingbird #CruelCountry #ManyWorlds #Cousin #Music https://andrewjshields.blogspot.com/2024/06/a-deep-dive-into-wilco-especially-cruel.html

Dark Matter pokes all my synapses.

Seconds into the trailer I knew I had to watch this show.
Two episodes in and we’re loving it.
#Quantum #ManyWorlds #superposition

“After almost a century of arguments, physicists still disagree on how to make the leap from mathematics to the tangible, physical world.”

#science #quantum #physics #multiverse #schrodinger
#cat #ManyWorlds
https://www.newscientist.com/article/mg26234860-100-the-multiverse-could-be-much-much-bigger-than-we-ever-imagined/

In this video, Matt O’Dowd tackles the issue of probabilities in the many-worlds interpretation of quantum mechanics.

A quick reminder. The central mystery of quantum mechanics is that quantum particles move like waves of possible outcomes that interfere with each other, until a measurement happens, when they appear to collapse to one localized outcome, the famous wave-particle duality.

This is the measurement problem, which interpretations of quantum mechanics try to solve. One the oldest and most popular, Copenhagen, asserts that this duality is fundamental, and that further investigation is misguided. Pilot-wave posits both a particle and a wave the entire time.

Many-worlds take the structure of quantum theory as complete, that quantum physics applies to us and the environment as much as particles, resulting in a universe that is itself a wave of all possible outcomes. We only see one outcome of the measurement because we’re the version that sees that outcome, with a version of us seeing each possible outcome.

A longstanding objection to many-worlds is how to talk about probabilities. Probabilities seem reasonable in an interpretation where there’s only one outcome. But if every outcome happens, in what sense is it meaningful to talk about the probability of any one outcome? Aren’t they all 100% probable?

This objection has never bothered me, mostly because I see probabilities as relative to an observer and their limited knowledge. That’s easier to see when looking at at something like the weather forecast, where probabilities more obviously reflect our limited knowledge.

As O’Dowd explains, we can see the probabilities in many-worlds as self locating uncertainty, a view Sean Carroll champions. In the process of explaining this, O’Dowd discusses the nature of worlds in the theory, something I’ve tried to tackle before (here and here) but mostly failed at. Maybe his card stack metaphor works better for most people.

The video runs about 19 minutes.

(Here’s a link to the video in case the embed doesn’t display.)

In the end, this is a devilishly difficult concept to explain. Which makes the video tough to follow. It might help if you have time to watch it multiple times.

It’s worth noting that there are other proposed solutions to the probability problem. But I think this one makes the most sense, although the others aren’t necessarily wrong. It comes down to your philosophy of probability. The claims of being able to derive the Born Rule in many-worlds are controversial. But at worst the theory has to simply accept the rule as a postulate, similar to the other interpretations.

What do you think? Did O’Dowd’s approach help? If not, any thoughts on where it fumbles? Or about where the explanation itself might be wrong?

https://selfawarepatterns.com/2023/12/02/many-worlds-probabilities-and-world-stacks/

New updated #introduction / pinned:

The "Starship Schrödinger's Destiny" is an #interactive #vr #scifi #story about the crew of a #flyingsaucer

The story is about #manyworlds and we love the title because it's a contradiction: There can be no single destiny in a Schrödinger multiverse, all outcomes all happen with varying amplitudes.

And yet it is more #deterministic to have those amplitudes, than to just be selecting outcomes randomly. There is also a sense in which we are all destined to see all outcomes.

We are looking forward to building this choose-your-own-adventure in a multiverse setting, because there are so many ways in which all the choose-your-own-adventure style books demonstrate a multiverse too. All the possible outcomes existing all at once, but read with varying amplitudes.

But it's not just our story: The engine we are building to let us tell our story will be open for others to enact their own. To puppet the characters themselves, tell their own story. In a multiverse, all things can happen.

That's the plan anyway. Very early still. V0.3 took like four years. Hoping V0.4 will be quicker, but I seem to have decided it's time for the complete-rewrite, so. Ugh.

But there are milestone-movies along the way:

V0.1 saw our story "Forgettery".
https://starshipsd.com/pre/forgettery/

V0.2 was entitled "Eggs"
https://starshipsd.com/pre/eggs/

V0.3 was entitled "Payment"
https://starshipsd.com/pre/payment/


V0.3 is a massive leap forwards, which is why it has taken so very very long, and the coming V0.4 I hope will be basically feature-complete and written so I can share as much of the source as possible.

In the meantime, we have a side-story about aliens discovering a planet on the brink of economic and environmental collapse! Lots of shorts here:

https://starshipsd.com/observers/

#BarryLoewer - #Events in #QuantumMechanics and #Relativity

https://www.youtube.com/watch?v=gxefi2CgXog&ab_channel=CloserToTruth

#Science '#Philosophy #PhilosophyOfScience #Foundations #LawsOfPhysics #LawsOfNature #TheLawsOfNature #TheLawsOfPhysics #Reductionism #QM #GR #GeneralRelativity #SpecialRelativity #MeasureProblem #TheMeasureProblem #WaveFunction #WaveFunctionCollapse #Decoherence #DavidBohm #BohmianMechanics #EverettianMechanics #ManyWorlds #ManyWorldsInterpretation #HiddenVariables #CloserToTruth #RobertKuhn