Quantum gravity, teleportation, wormholes, etc.!
- AntennaGuy
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Quantum gravity, teleportation, wormholes, etc.!
As Rod Serling used to say... "Submitted for your approval," and as Alice cried, "curiouser and curiouser," see
Quantum Gravity in the Lab:Teleportation by Size and Traversable Wormholes
https://arxiv.org/pdf/1911.06314.pdf
as cited by https://www.technologyreview.com/s/6147 ... f-reality/
Hmmm.
This is another one of those analogy/model thing type papers, where an experiment or idea that is being investigated is meant to share the behaviors of interest with something else that is physically quite different, so it is hoped that by studying one, you learn something about the other. Like studying sound waves to learn more about electromagnetic waves, perhaps, and not saying they are actually the same thing. I find this sort of endeavor quite confusing. ....Yes, it appears they are saying their work "mimics" the phenomena of interest, so that is consistent. Geez. This is akin to the whole notion of how analog computers work, such as the "electrolytic plotting tank." You replace one system with a another one that has some convenient physics that (hopefully) obeys the same equations. E.g., https://www.sciencedirect.com/topics/en ... ytic-tanks Okeydokey then, I suppose.
Quantum Gravity in the Lab:Teleportation by Size and Traversable Wormholes
https://arxiv.org/pdf/1911.06314.pdf
as cited by https://www.technologyreview.com/s/6147 ... f-reality/
Hmmm.
This is another one of those analogy/model thing type papers, where an experiment or idea that is being investigated is meant to share the behaviors of interest with something else that is physically quite different, so it is hoped that by studying one, you learn something about the other. Like studying sound waves to learn more about electromagnetic waves, perhaps, and not saying they are actually the same thing. I find this sort of endeavor quite confusing. ....Yes, it appears they are saying their work "mimics" the phenomena of interest, so that is consistent. Geez. This is akin to the whole notion of how analog computers work, such as the "electrolytic plotting tank." You replace one system with a another one that has some convenient physics that (hopefully) obeys the same equations. E.g., https://www.sciencedirect.com/topics/en ... ytic-tanks Okeydokey then, I suppose.
* Meade 323 refractor on a manual equatorial mount.
* Celestron C6 SCT on a Twilight 1 Alt-Az mount
Prof. Barnhardt to Klaatu in The Day the Earth Stood Still: "There are several thousand questions I'd like to ask you.”
* Celestron C6 SCT on a Twilight 1 Alt-Az mount
Prof. Barnhardt to Klaatu in The Day the Earth Stood Still: "There are several thousand questions I'd like to ask you.”
- notFritzArgelander
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Re: Quantum gravity, teleportation, wormholes, etc.!
Ah well. Embracing my inner churlishly skeptical curmudgeon, I'm skeptical.
In the famous analogies of the mechanical pendulum with friction with the spring loaded dashpot (i.e. old fashioned shock absorber) and with the passive electrical circuit containing only inductances, resistances, and capacitances we know that the the equations describing the three systems are identical. So studying one is like studying any of the others and an analog computer can faithfully replicate all.
Since we have no clue what the equations of quantum gravity are at all this is all speculative handwaving.
Besides there are impossibility theorems in GR for traversibility of wormholes, so there's that too.
:shrug:
In the famous analogies of the mechanical pendulum with friction with the spring loaded dashpot (i.e. old fashioned shock absorber) and with the passive electrical circuit containing only inductances, resistances, and capacitances we know that the the equations describing the three systems are identical. So studying one is like studying any of the others and an analog computer can faithfully replicate all.
Since we have no clue what the equations of quantum gravity are at all this is all speculative handwaving.
Besides there are impossibility theorems in GR for traversibility of wormholes, so there's that too.
:shrug:
Scopes: Refs: Orion ST80, SV 80EDA f7, TS 102ED f11 Newts: AWB 130mm, f5, Z12 f5; Cats: VMC110L, Intes MK66,VMC200L f9.75 EPs: KK Fujiyama Orthoscopics, 2x Vixen NPLs (40-6mm) and BCOs, Baader Mark IV zooms, TV Panoptics, Delos, Plossl 32-8mm. Mixed brand Masuyama/Astroplans Binoculars: Nikon Aculon 10x50, Celestron 15x70, Baader Maxbright. Mounts: Star Seeker IV, Vixen Porta II, Celestron CG5
- AntennaGuy
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Re: Quantum gravity, teleportation, wormholes, etc.!
It seems to me that this approach is especially effective at generating popular-science articles with excessively-exciting and misleading headlines. I don't recall seeing so much of this going on when I was younger, but then, I suppose some of it was going on, just not on the internet. After all, consider the title of the article for the masses: "How a tabletop experiment could test the bedrock of reality." Hype much?notFritzArgelander wrote: ↑Sun Dec 08, 2019 4:26 am Ah well. Embracing my inner churlishly skeptical curmudgeon, I'm skeptical.
In the famous analogies of the mechanical pendulum with friction with the spring loaded dashpot (i.e. old fashioned shock absorber) and with the passive electrical circuit containing only inductances, resistances, and capacitances we know that the the equations describing the three systems are identical. So studying one is like studying any of the others and an analog computer can faithfully replicate all.
Since we have no clue what the equations of quantum gravity are at all this is all speculative handwaving.
Besides there are impossibility theorems in GR for traversibility of wormholes, so there's that too.
:shrug:
* Meade 323 refractor on a manual equatorial mount.
* Celestron C6 SCT on a Twilight 1 Alt-Az mount
Prof. Barnhardt to Klaatu in The Day the Earth Stood Still: "There are several thousand questions I'd like to ask you.”
* Celestron C6 SCT on a Twilight 1 Alt-Az mount
Prof. Barnhardt to Klaatu in The Day the Earth Stood Still: "There are several thousand questions I'd like to ask you.”
- notFritzArgelander
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Re: Quantum gravity, teleportation, wormholes, etc.!
Partly it's out of frustration that making progress is getting harder. The difficulties of the needed experiments outstrip our technological capabilities. That said I'm pretty grumpy that folks try to take silly hype ridden short cuts like this. Much fanfare, sound and fury, signifying nothing.AntennaGuy wrote: ↑Sun Dec 08, 2019 4:31 amIt seems to me that this approach is especially effective at generating popular-science articles with excessively-exciting and misleading headlines. I don't recall seeing so much of this going on when I was younger, but then, I suppose some of it was going on, just not on the internet. After all, consider the title of the article for the masses: "How a tabletop experiment could test the bedrock of reality." Hype much?notFritzArgelander wrote: ↑Sun Dec 08, 2019 4:26 am Ah well. Embracing my inner churlishly skeptical curmudgeon, I'm skeptical.
In the famous analogies of the mechanical pendulum with friction with the spring loaded dashpot (i.e. old fashioned shock absorber) and with the passive electrical circuit containing only inductances, resistances, and capacitances we know that the the equations describing the three systems are identical. So studying one is like studying any of the others and an analog computer can faithfully replicate all.
Since we have no clue what the equations of quantum gravity are at all this is all speculative handwaving.
Besides there are impossibility theorems in GR for traversibility of wormholes, so there's that too.
:shrug:
Scopes: Refs: Orion ST80, SV 80EDA f7, TS 102ED f11 Newts: AWB 130mm, f5, Z12 f5; Cats: VMC110L, Intes MK66,VMC200L f9.75 EPs: KK Fujiyama Orthoscopics, 2x Vixen NPLs (40-6mm) and BCOs, Baader Mark IV zooms, TV Panoptics, Delos, Plossl 32-8mm. Mixed brand Masuyama/Astroplans Binoculars: Nikon Aculon 10x50, Celestron 15x70, Baader Maxbright. Mounts: Star Seeker IV, Vixen Porta II, Celestron CG5
- GCoyote
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Re: Quantum gravity, teleportation, wormholes, etc.!
It's mostly the need for new content 24/7 vs real progress which is far more episodic and not supportive of editorial deadlines.
Any metaphor will tear if stretched over too much reality.
Gary C
Celestron Astro Master 130mm f5 Newtonian GEM
Meade 114-EQ-DH f7.9 Newtonian w/ manual GEM
Bushnell 90mm f13.9 Catadioptric
Gskyer 80mm f5 Alt/Az refractor
Jason 10x50 Binoculars
Celestron 7x50 Binoculars
Svbony 2.1x42 Binoculars
(And a bunch of stuff I'm still trying to fix or find parts for.)
Gary C
Celestron Astro Master 130mm f5 Newtonian GEM
Meade 114-EQ-DH f7.9 Newtonian w/ manual GEM
Bushnell 90mm f13.9 Catadioptric
Gskyer 80mm f5 Alt/Az refractor
Jason 10x50 Binoculars
Celestron 7x50 Binoculars
Svbony 2.1x42 Binoculars
(And a bunch of stuff I'm still trying to fix or find parts for.)
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