Hong Kong scientists 'show time travel is impossible'

[rodsky]

it is not time travelling bro, stasis manang imong gipasabot..
Basa: Stasis ( /ˈsteɪsɪs/), or hypersleep, is a science fiction concept akin to suspended animation. Whereas suspended animation usually refers to a greatly reduced state of life processes, stasis implies a complete cessation of these processes, which can be easily restarted or restart spontaneously when stasis is removed. Depending on the work of fiction in which it is depicted, stasis has particular properties useful to science fiction storylines.

Stasis, in all practical aspects, is a form of "time travel" from the perspective of the person experiencing stasis. Bisan unsaon nimo pag "unconvince" sa iyaha, ang feeling dyud sa tawo nga nag experience ug stasis is that he somehow travelled into the future. The best examples of these are people who went comatose for YEARS, and pag mata nila, lahi na ang kalibutan--sila mismo ang mosulti nga "...I feel like I travelled to the future..." and in all practical aspects, I'd have to agree that he did.

However, there's a way to travel into the future without having to undergo stasis, but the vessel you are riding should approach around 99.8% the speed of light. When time dilation sets in, just travelling for a few days around interstellar space, and returning to your point of origin, you will find out that hundreds of years have passed by. This is discussed in the STR, and is the closest form of FACTUAL time travel to the future that we can say is NOT breaking any rules of physics.

-RODION

[vern]

I don't see anything wrong with speculating at what might be possible with physics that we are not familiar with. If people were forbid to discuss topics that are not widely accepted, science would be nowhere.

[rodsky]

I don't see anything wrong with speculating at what might be possible with physics that we are not familiar with. If people were forbid to discuss topics that are not widely accepted, science would be nowhere.

I'm all for an academic discussion of possibilities and speculation is fine. I just don't like how discussions here tend to turn "good" threads into ones that are just plain absurd when you read the last few posts. I guess this is then just an issue of vigilance--I mean I hate to scan each and every topic and find out that a great discussion on speculation ended up with someone trying to sell a friend's water engine towards the end of the thread.

-RODION

[treize]

Travelling to the past and back to the present, or travel hundreds of years to the future? No matter which way I look, it couldn't be possible. Maybe to parallel universes but not to a single universe.

[fritzd]

Did you know that Professor Du used a Bose-Einstein Condensate as a tool in his experiment...

This has also been feature on PRL Physics - Single photons obey the speed limits (email me here fdiorico@ati.ac.at if you want a copy of the original publication) More details on their experiment here, Study finds single photons cannot exceed the speed of light They used electromagnetically induced transparency in the Bose-Einstein Condensate. More on that here. [cond-mat/0603094] Electromagnetically induced transparency in an atom-molecule Bose-Einstein condensate or http://www.ino.it/home/francesco.min...-OptComm02.pdf

In case if you haven't noticed, Bose-Einstein Condensates are (insanely)/very useful tools in all fields of Physics. https://www.istorya.net/forums/scienc...d-physics.html

Here's a link of Professor Du's group homepage.
Shengwang Du's group at HKUST

[Blackbeard]

impossible considering present technology and understanding. flying to space and to the moon were also deemed impossible, but humanity did it anyway. maybe in a thousand or so years someone would be able to make time travel possible.

imo it's best to not fiddle with time.

[likyam]

in science, there would always be impossibilities due to absence of PROOF

but in God, for which i believe more than science, NOTHING IS impossible

[istoryamember]

impossible pa ni karon

[vern]

I'm all for an academic discussion of possibilities and speculation is fine. I just don't like how discussions here tend to turn "good" threads into ones that are just plain absurd when you read the last few posts. I guess this is then just an issue of vigilance--I mean I hate to scan each and every topic and find out that a great discussion on speculation ended up with someone trying to sell a friend's water engine towards the end of the thread.

-RODION

Then posts that become absurd should be moderated. I don't think a certain topic should be off limits because it has the chance of becoming absurd.

[rodsky]

Then posts that become absurd should be moderated. I don't think a certain topic should be off limits because it has the chance of becoming absurd.

Point taken. I'll make the necessary changes to reminders I've stickied.

-RODION