Beam Me Up: 'Teleportation' Is Year's Biggest Breakthrough

[TLAM Strike]

Originally Posted by onelifecrisis

I'm not sure what you mean.
If time travel is possible and it creates new realities then every time something travels through time a reality is created in which something or someone just popped into existence. How come we're not in one of those realities? Do we just happen to be in the "original" reality?

With out knowing that a time travel event occurred they we can't know.

My use of the word "vaporised" was whimsical. The point is that you wouldn't know where it went or what state it arrived in. All you'd know is that it disappeared. You could say "I made a machine that makes things disappear! REALLY disappear!" and someone would probably give you a physics prize, but I bet you couldn't persuade anyone to get in and go for a ride. Even if you could, you'd still have no idea whether you'd made a time travel machine or a "vaporizer".

Well you are assuming that someone just tossed a bunch of parts together and declared it a time machine. How to construct a time machine is actually know, but insanely difficult to do- it involves wormholes, black holes and near light speed velocities. In such a case matter can travel both ways though a wormhole allowing the traveler to return and confirm the trip.

[onelifecrisis]

I thought wormholes were supposed to connect regions of space-time within our reality, not connect to other realities.

[TLAM Strike]

Originally Posted by onelifecrisis

I thought wormholes were supposed to connect regions of space-time within our reality, not connect to other realities.

As I understand it they can both connect to other realities.

Isn’t time travel by wormhole or any other means impossible due to the paradoxes that it implies?
Not necessarily. Dealing with time travel paradoxes by conjecturing the impossibility of time travel is only one of three ways of resolving the issue. The other ways are:
1) Impose self consistency on classical physics: A time traveler cannot change the past because he was always part of it. When he attempts to change the past, his efforts will be thwarted by an apparent conspiracy of events. 2) Impose self consistency on quantum physics: A time traveler cannot change the past because all possible pasts have already occurred in parallel universes. When he attempts to change the past, his efforts will not seem to him to be thwarted. This is because he will have entered the past of a preexisting parallel universe in which he has already made the changes that he seeks to effect.

http://www.webfilesuci.org/WormholeFAQ.html

[Sailor Steve]

All of the above is pure speculation. Until a real experiment is conducted, how does anyone know what a wormhole actually does or where it leads? How does anyone know what can or can't be done with time travel until someone actually does it?

[DarkFish]

Originally Posted by TLAM Strike

How to construct a time machine is actually know, but insanely difficult to do- it involves wormholes, black holes and near light speed velocities. In such a case matter can travel both ways though a wormhole allowing the traveler to return and confirm the trip.

So until someone invents the portable wormhole a time machine is not just insanely difficult but impossible to make

[onelifecrisis]

1) Impose self consistency on classical physics: A time traveler cannot change the past because he was always part of it. When he attempts to change the past, his efforts will be thwarted by an apparent conspiracy of events.

Wouldn't the "conspiracy of events" constitute a change to the past? Not the change intended by the traveller, but still a change.

2) Impose self consistency on quantum physics: A time traveler cannot change the past because all possible pasts have already occurred in parallel universes. When he attempts to change the past, his efforts will not seem to him to be thwarted. This is because he will have entered the past of a pre-existing parallel universe in which he has already made the changes that he seeks to effect.

If he intends to change something then he must enter the parallel universe at a time prior to the events that he wishes to change, in which case how can he have already made the changes?

[MH]

Originally Posted by onelifecrisis

If he intends to change something then he must enter the parallel universe at a time prior to the events that he wishes to change, in which case how can he have already made the changes?

What it means that the universe knows that he will enter to change the past and the stage is already set for this.

[MaddogK]

Yup, time travel is possible because they can do it on paper.

...sounds like the 'it's true because I read it on the internet' argument.

[onelifecrisis]

Originally Posted by MH

What it means that the universe knows that he will enter to change the past and the stage is already set for this.

So we're talking about a deterministic universe? In which case there is only one universe, not many. Contradiction.

Originally Posted by MaddogK

Yup, time travel is possible because they can do it on paper.

In physics some very important things have been shown to be true on paper before they were shown to be true by experimentation.

Originally Posted by MaddogK

...sounds like the 'it's true because I read it on the internet' argument.

Er, not really.

[Diopos]

Originally Posted by TLAM Strike

...
Not really, in any reaction no matter is created or destroyed. This is a fundamental law of physics. A through examination of the machine would show that all the matter in the traver's body either was converted to another state (destroyed) or is not there anymore (sent to another reality).

Mass is "destroyed" or "created" all the time producing or expending equivalent amounts of energy. E=mc² and all that. It's the sum of mass and energy that remains constant. Atomic bomb anyone? BUT in systems where you don't have nuclear reactions or sub atomic particle """transformations""" mass is preserved ... pending further investigation


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[TLAM Strike]

Originally Posted by Diopos

Mass is "destroyed" or "created" all the time producing or expending equivalent amounts of energy. E=mc² and all that. It's the sum of mass and energy that remains constant. Atomic bomb anyone? BUT in systems where you don't have nuclear reactions or sub atomic particle """transformations""" mass is preserved ... pending further investigation


.

But mass is not matter. You can add mass by increasing speed but the matter in an object does not increase.

[kiwi_2005]

Wouldn't it be great if we all had a teleporter machine in our living rooms as common as the television. Just hop on the teleporter and zap to your destination, forgot to do that report for your boss and time is up go back 24hrs and start on it. Haha. Not in our lifetime.

[TLAM Strike]

Originally Posted by kiwi_2005

Wouldn't it be great if we all had a teleporter machine in our living rooms as common as the television. Just hop on the teleporter and zap to your destination, forgot to do that report for your boss and time is up go back 24hrs and start on it. Haha. Not in our lifetime.

Is that really the best use you can think of for a teleporter/time machine? Redo a report for your boss?

This thread reminded me of a Sci-Fi story I read long ago.
If a viewing device was placed far enuff from Earth you could view past events in real time.
Given the speed of light?
The theory is possible.
Placed far enuff from Earth we could view the bombing of Japan with Nukes and such.
Closer looks would require better viewers of course.
It was a good book!
Does anyone remember the name of that Book?
I'd like to read it again.

[Diopos]

Originally Posted by TLAM Strike

But mass is not matter. You can add mass by increasing speed but the matter in an object does not increase.

Ahh. We're getting dirty aren't we?!
Relativistically speaking you are correct. Mass is a measure of inertia rather than amount of substance. But when you wrote: "Not really, in any reaction no matter is created or destroyed" you were actually using a phrase directly pointing to the "conservation of mass law" as formulated by Antoine Lavoisier. Back then the universe was Newtonian and matter mattered!!!

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