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Travel through wormholes is possible, but slow

phys.org

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Re: Travel through wormholes is possible, but slow

#31

Post by FakeComments »

eigenschwarz wrote: post #17
SketchySeaBeast wrote: post #2

Can someone point out where the article says why it's slower? I'm having difficulty unpacking: "The new theory was inspired when Jafferis began thinking about two black holes that were entangled on a quantum level, as formulated in the ER=EPR correspondence by Juan Maldacena from the Institute for Advanced Study and Lenny Susskind from Stanford. Although this means the direct connection between the black holes is sho…

The Average Null Energy Condition (ANEC) makes it so there can not be a traversable wormhole joining two otherwise disconnected regions of spacetime. So by construction, any infinite null geodesic (a light ray) which makes it through the wormhole must be chronal (causally connected). This means there can be no traveling faster than light over long distances by going through one.

You don’t really explain how the assumption leads to the conclusion — and I’m left with the impression you used many words to say “they just assumed you can’t”.

Could you elaborate?

Edit:

Looking into energy conditions further, they are literally assumed restrictions on the equations because physicists felt some predictions were unphysical.

I’d really like if someone could explain if there’s any justification to what I was responding to beyond “well, because we assumed it should work that way”.

I think it behooves the physics community to be honest which claims are conclusions and which are their assumptions, and the specific reasoning that leads from assumption to conclusion.

Re: Travel through wormholes is possible, but slow

#32

Post by svnpenn »

chrxr wrote: post #20
jaequery wrote: post #6

When ever I think of traveling through a wormhole/blackhole, I imagine you would be squished and crushed and come out the other end as pure vaporized energy. This makes me wonder, if there is the potential for our beings (or things) be able to be vaporized and then recreated to original form. If we are just mass and particles, this should be possible?

The philosophical implications of this are the subject of one of my favorite web-comics: The Machine, from Existential Comics http://existentialcomics.com/comic/1

https://wikipedia.org/wiki/The_Jaunt

https://wikipedia.org/wiki/White_Christmas_(Black_Mirror)

Re: Travel through wormholes is possible, but slow

#33

Post by soulofmischief »

FrancoisBosun wrote: post #16
adrianN wrote: post #7

Earlier quoted context omitted.

Things are moving away from us at a speed proportional to their distance. The fastest objects are actually faster than the speed of light.

I thought nothing could move faster than light?

Nothing's moving. It's like if you ran a 100m but while you were running, they decided to make it a 200m.

If you speed up, you can finish the race in the same amount of time. Light always finishes the race in the same amount of time from each observer's perspective. It can always speed up because it's massless, but you have mass and there is a limit to how much you can speed up. According to general relativity, an observer outside of the racetrack won't see light change speed, nor will you. But both of you will perceive distortions of space and time to accommodate light's "change in speed" to make it look as if nothing's changed.

Back to the cosmological horizon... We don't see a big jump in the racetrack because the distance between 100m and 200m isn't too massive; likewise, gravity and other forces hold objects together even though space is expanding and pulling them apart.

But there is a certain distance where gravity and other forces can't keep things together. Where that 1000k becomes a 10000k. The pull from one galactic cluster to another is just too weak. Anything past this point is moving away from us. That's why only galaxies close to us aren't redshifting away. But any observer anywhere in the universe would observe that they are at the epicenter of an expansion where everything is moving away from them.

Re: Travel through wormholes is possible, but slow

#34

Post by 013a »

diminoten wrote: post #27
dosy wrote: post #10

Does anyone here ever question if there's a secret space program? Trillions of dollars of pentagon money just vanished. Whistle-blowers come forward. Patent suppression, TR-3B/Black manta sightings worldwide. But mainstream "science" and "tech", know nothing about it, right? Little bit strange. What's stranger is how wages and standard of living (minus a few tech devices) hasn't changed much in 30 years. Air travel i…

A conspiracy that large would leak. This fact kills most conspiracy theories -- humans can't help but share cool shit.

Though, to be fair: there have been "leaks" and sightings of unexplained aircraft. We just chalk it up to unreliable narrators and conspiracy theories. Leaks have to happen, but equally: we have to believe them for it to be justified as a leak.

Re: Travel through wormholes is possible, but slow

#35

Post by logfromblammo »

philipov wrote: post #3
SketchySeaBeast wrote: post #2

Can someone point out where the article says why it's slower? I'm having difficulty unpacking: "The new theory was inspired when Jafferis began thinking about two black holes that were entangled on a quantum level, as formulated in the ER=EPR correspondence by Juan Maldacena from the Institute for Advanced Study and Lenny Susskind from Stanford. Although this means the direct connection between the black holes is sho…

Based on the colloquia I watched by Lenny Susskind, the problem is that you can put something into a wormhole, but to get it out the other end, you have to carry the encoding you get to the other end of the wormhole to decode the output. Because the distance to the singularity grows at the speed of light, the length of the wormhole is essentially infinite. It is only the operator you get from putting the object into…

So...

Two entangled wormhole apertures function as Star Trek style transporter pads. Feed mass into one hole, scanning it as it goes in. Transmit the pattern to another aperture of the hole, using electromagnetic energy at the speed of light, and when that end ejects a mass, apply the pattern to it, so it resolves into an exact copy of what you put in.

The distance the mass travels may be shorter than the distance the energy travels, but it can't resolve exiting mass as that object until the information--that had to travel at the speed of light--arrives.

So you could potentially use a wormhole as a suicide machine that transports a copy of you, that thinks it actually is you, to a distant location no faster than the speed of light, in zero subjective time for the thing that will then think it's you.

Is that a reasonable interpretation?

Re: Travel through wormholes is possible, but slow

#36

Post by philipov »

vectorEQ wrote: post #29
lawlessone wrote: post #5

Earlier quoted context omitted.

> Because the distance to the singularity grows at the speed of light, doesn't our universe expand at the same speed?

:D is the universe expanding, or revealing more of itself? if the universe is expanding at the speed of light, doesn't that imply that just light is reaching us more from further away places? sorry to be off topic but that comment gave me this brainfart.

The universe is revealing more of itself as light reaches us from farther away, but because the universe is both expanding and that expansion is accelerating, there is a maximum distance we will ever be able to see: the Hubble Distance. I don't think the universe is old enough for light to reach us from that far yet, which is why we can still see the cosmic microwave radiation, but give it a few trillion years, and we won't even be able to see other galaxies because they will recede from us, redshift, and disappear.

Re: Travel through wormholes is possible, but slow

#37

Post by martin-adams »

jaequery wrote: post #6

When ever I think of traveling through a wormhole/blackhole, I imagine you would be squished and crushed and come out the other end as pure vaporized energy. This makes me wonder, if there is the potential for our beings (or things) be able to be vaporized and then recreated to original form. If we are just mass and particles, this should be possible?

Even if we are just mass and particles, then what happens if you just skip the vaporizing part. (https://www.youtube.com/watch?v=nQHBAdShgYI)

Re: Travel through wormholes is possible, but slow

#38

Post by dosy »

diminoten wrote: post #27
dosy wrote: post #10

Does anyone here ever question if there's a secret space program? Trillions of dollars of pentagon money just vanished. Whistle-blowers come forward. Patent suppression, TR-3B/Black manta sightings worldwide. But mainstream "science" and "tech", know nothing about it, right? Little bit strange. What's stranger is how wages and standard of living (minus a few tech devices) hasn't changed much in 30 years. Air travel i…

A conspiracy that large would leak. This fact kills most conspiracy theories -- humans can't help but share cool shit.

if it leaks so easy why don't we have a clear picture of the trillions? but if it doesn't leak at all, why all this info? the Pentagon fast Walker tic tac video. and whistleblowers. Corey Goode, Emery Smith. I mean some of these people are probably limited Hangouts, or shady, but there's edge of wonder, which is the most obviously intelligence agency-backed disclosure project I've seen. unacknowledged, beyond majestic, chart topping docos.

Re: Travel through wormholes is possible, but slow

#39

Post by Thinkx220 »

chrxr wrote: post #20
jaequery wrote: post #6

When ever I think of traveling through a wormhole/blackhole, I imagine you would be squished and crushed and come out the other end as pure vaporized energy. This makes me wonder, if there is the potential for our beings (or things) be able to be vaporized and then recreated to original form. If we are just mass and particles, this should be possible?

The philosophical implications of this are the subject of one of my favorite web-comics: The Machine, from Existential Comics http://existentialcomics.com/comic/1

I don't think you can equate the teleportation station with sleep since sleep isnt a break in consciousness but more like a transition into a lower level of consciousness.

Re: Travel through wormholes is possible, but slow

#40

Post by dosy »

013a wrote: post #34
diminoten wrote: post #27

Earlier quoted context omitted.

A conspiracy that large would leak. This fact kills most conspiracy theories -- humans can't help but share cool shit.

Though, to be fair: there have been "leaks" and sightings of unexplained aircraft. We just chalk it up to unreliable narrators and conspiracy theories. Leaks have to happen, but equally: we have to believe them for it to be justified as a leak.

the Pentagon tic tac video can not be thus chalked up. the Japan airlines radar of craft going 8000 mph too.
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