#TimeTravelTuesday #ThoughtExperiment: Many #Worldlets?

or in other words, fractions of #World, not the whole World. #TimeTraveler #theories often involve splitting or multiplying #universes. Time Travel events divide #spacetime into two near-identical clones. Grandfather lived or did not, you did not meet yourself or you did. But if we think this through further, its scope might not be quite so universal as typically presented.

Take 3 heavenly bodies: Mother #Earth, the #AlphaCentauri triple star system (at 4+ light years away), and #Polaris, the #NorthStar (at 400+ light years away).

Now we program our #TimeMachine to take us back one year (#retrograde) where we meet ourselves. Hi selves! This all takes place in one year. There's the original us, there's us leaving the present, and there's us meeting our past/original selves a year earlier — standard #boilerplate #scifi #movie #script.

Alpha Centauri will have to wait another 3 years before any of this information can get to there. This is related to the concept of a #lightcone which expands at the speed of light. This doesn't sound quite so much like birthing a twin universe, does it? Now what about the North Star? It will have to wait 433 years for news of our Time Travel event(s). And that's still pretty much in our tiny #celestial neighborhood.

The point is that the effects of such events are largely localized and rapidly diluted as we move farther away. This still has its paradoxical problems, but it doesn't quite feel like the whole universe dividing into two — maybe part of it (a universelet? a subuniverse?) Possibilities are that in moving further out in space-time, the effects of a Time Travel incident may be 'blurred out', as are anomalous numerical samples in the law of large #numbers. If one pours a cup of coffee into a lake, it doesn't change the color of the lake. There is a brief chaotic #glitch before it is no longer measurable.

It is tempting to imagine space-time as "stitching" itself back together. (Glitch & stitch?) Such speculations are related to #StephenHawking's "chronology protection conjecture" of 1992. And along with #blackholes, #entanglement, and other #quantum phenomena, if Time Travel is possible, then we should be looking for it at every scale. We could be surrounded by time-traveling particles everywhere all the #Time.

🔗 https://Wikipedia.org/wiki/Many-worlds_interpretation … #ManyWorlds
🔗 https://Wikipedia.org/wiki/Temporal_paradox#Consistency_paradox … #GrandfatherParadox
🔗 https://Wikipedia.org/wiki/Light_cone … #LightCone
🔗 https://Wikipedia.org/wiki/Time_travel#Absence_of_time_travelers_from_the_future … #TimeTravelTheory
🔗 https://Wikipedia.org/wiki/Law_of_large_numbers … #LawOfLargeNumbers
🔗 https://Wikipedia.org/wiki/Chronology_protection_conjecture … #ChronologyProtectionConjecture

#Community #TimeTravel #Research #GlitchInTime #Kronodon

Mills of Time de Pauline Rigal en Première mondiale au festival #cinemadureel 2025

#perspectivefilms
#RegionOccitanie
#OccitanieFilms
#Mecenesdusud
#ParcnationaldesCevennes
#ENSAPC
#NavireArgo #Labominable
#Lightcone #Atelier105

▶️ Minkowski Space-Time

❛❛ Points in this #space correspond to events in #SpaceTime ... a defined light-cone associated with each #point, and #events not on the light cone are classified by their relation to the apex as #spacelike or #timelike. It is principally this view of spacetime that is current nowadays ❜❜

🔗 https://www.youtube.com/watch?v=TNd7BOTqfV8 2022 Nov 30
🔗 https://Wikipedia.org/wiki/Minkowski_space … #Minkowski #space
🔗 https://Wikipedia.org/wiki/Light_cone … #LightCone

#Community #TimeTravel #Research #physics #maths #Kronodon

A #Berkeley Bed & Breakfast has turned from #RoseGarden Inn into an #AppliedRationality Conference Center and become legally embroiled in #SBF's #EffectiveAltruism #crypto cash chasing drama. Reps for #FTX victims want their million dollars back, while #Lightcone just wants to keep entertaining attendees with speakers from the meshing #SiliconValley scene of #HighFinance #AI and #eugenics

https://www.sfgate.com/tech/article/sbf-berkeley-rose-garden-inn-19520351.php

Follow up on Causality as an emergent phenomenon...

(Ref. to: https://qoto.org/@Pat/106722620334765036)

I found sources on the topic:

Causality – Complexity – Consistency:
Can Space-Time Be Based on Logic and Computation?
https://arxiv.org/pdf/1602.06987.pdf

Causal Emergence in Quantum Mechanics
https://arxiv.org/pdf/1901.07471.pdf

Perfect signaling among three parties
violating predefined causal order
https://arxiv.org/pdf/1312.5916.pdf

Causality theory for closed cone structures with applications
https://arxiv.org/pdf/1709.06494.pdf

Plus an older article, "CPT Violation Implies Violation of Lorentz Invariance" by O.W. Greenberg, which might be related to the topic.
https://arxiv.org/abs/hep-ph/0201258

I just found these yesterday on arXiv and really haven't vetted them much. There's more out there, mostly from the last decade or so. Not sure why I couldn't find this before -- I tried multiple times this year to find this stuff and now a week after I posted here I find a bunch of stuff. Go figure...

Some of it is about non-locality and some also on temporal non-causality like disordered cause/effect. (Some authors use the term acausality instead of non-causality.)

Also, there's a prof at U. Miss. (Luca Bombelli, www.phy.olemiss.edu/~luca/) with some nice reference lists:

Causality in Quantum Field Theory
https://www.phy.olemiss.edu/~luca/Topics/st/causal_qft.html

Causality in Quantum Theory
https://www.phy.olemiss.edu/~luca/Topics/st/causal_qm.html

Causality
https://www.phy.olemiss.edu/~luca/Topics/st/causal.html

Hope this useful.

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#atom #atoms #electron #proton #quark #neutron #electricity #stem #technology
#cern #matter #energy #higgs #particle #lorentz #simultaneity #lightcone
#physics #QM #relativity #gravity #time #space