Time travelling

[Lillen]

I remeber starting a thread on this long time ago, but when I search for it I cant find it. And there is a rule for not starting several threads with the same topic over and over again. But since I can't find it i don't know what to do.


Anyways, this is deduced from another conversation and I need to know: Do you think it would be practically possible to travell in time if we use two destinct defintions of time?

 

[elahmine]

Anyways, this is deduced from another conversation and I need to know: Do you think it would be practically possible to travell in time if we use two destinct defintions of time?

?????

 

[Wiccan_Child]

I remeber starting a thread on this long time ago, but when I search for it I cant find it. And there is a rule for not starting several threads with the same topic over and over again. But since I can't find it i don't know what to do.


Anyways, this is deduced from another conversation and I need to know: Do you think it would be practically possible to travell in time if we use two destinct defintions of time?

No - semantics has no bearing on the feasibility of time travel.

 

[Paradoxum]

I have no reason to think it isn't possible. We have alot of technologies today that might have seemed impossible at one point. I'm pretty sure we can teleport things now.

 

[selfinflikted]

I just wonder why we haven't been visited by folks from the future if time travel will ever be possible.

 

[Radagast]

I can travel into the future: I go to sleep, and when I wake up it's 8 hours later.

It's travelling into the past that's hard.

 

[Radagast]

I'm pretty sure we can teleport things now.

If you mean transmitting information about a particle faster than light, I'm pretty sure we can't. See the no-cloning theorem

 

[elahmine]

I time travel every time I have to go to my doctors appointment. It's always an hour earlier there than it is at my home thanx to time zones. See it's easy to travel back in time.

 

[Paradoxum]

If you mean transmitting information about a particle faster than light, I'm pretty sure we can't. See the no-cloning theorem

Doesn't entanglement change things faster than the speed of light?

 

[Radagast]

I time travel every time I have to go to my doctors appointment. It's always an hour earlier there than it is at my home thanx to time zones. See it's easy to travel back in time.

I can do better than that: QF11, Sydney to LAX. Depart 13:05, arrive 09:14 the same day.

 

[Radagast]

Doesn't entanglement change things faster than the speed of light?

Yes, but you can't send information that way.

 

[Illuminaughty]

Quantum Teleportation:

Quantum teleportation, or entanglement-assisted teleportation, is a process by which a qubit (the basic unit of quantum information) can be transmitted exactly (in principle) from one location to another, without the qubit being transmitted through the intervening space.

Work in 1998 verified the initial results,[2] and in August 2004 increased the distance of teleportation to 600 meters using optical fiber.[3] The longest distance yet claimed to be achieved for quantum teleportation is 143 km (89 mi) in May 2012 between the two Canary Islands of La Palma and Tenerife off the Atlantic coast of north Africa.[4] In April 2011, experimenters reported that they had demonstrated teleportation of wave packets of light up to a bandwidth of 10 MHz while preserving strongly nonclassical superposition states.[5][

 

[Radagast]

Quantum teleportation, or entanglement-assisted teleportation, is a process by which a qubit (the basic unit of quantum information) can be transmitted exactly (in principle) from one location to another, without the qubit being transmitted through the intervening space...

I notice you chopped out this sentence from that article: "It is useful for quantum information processing, however it does not immediately transmit classical information, and therefore cannot be used for communication at superluminal (faster than light) speed."

 

[Illuminaughty]

It doesn't have to transport classical information.

 

[Lillen]

Semantics... How do you mean there? There are plenty of definitions within science. Diffrent defintions on the same theory. Same within math and physics. It could be rendered as just being diffrent patented sentences. But it could rendered as diffrent defintions of forumlas, equations and functions

 

[elahmine]

I can do better than that: QF11, Sydney to LAX. Depart 13:05, arrive 09:14 the same day.

Did you ended repeating your actions again? Did you have breakfast again?

 

[Wiccan_Child]

Semantics... How do you mean there? There are plenty of definitions within science. Diffrent defintions on the same theory. Same within math and physics. It could be rendered as just being diffrent patented sentences. But it could rendered as diffrent defintions of forumlas, equations and functions

Sure, but changing one's definitions doesn't change reality.

We can redefine our coordinates from Cartesian to spherical polar to anything else, but that's only our own, personal reference system - it has no bearing whatsoever on reality.

 

[Wiccan_Child]

Doesn't entanglement change things faster than the speed of light?

Entanglement seems to cause instantaneous 'spooky action at a distance', but not in any way that allows information to flow back and forth.

 

[Radagast]

It doesn't have to transport classical information.

But if it doesn't, what use is it?

I also note that "The components of a maximally entangled two-qubit state are distributed to Alice and Bob" is both (1) slow and (2) tricky.

However, we can still do some interesting things with quantum entanglement.

 

[Radagast]

Did you ended repeating your actions again? Did you have breakfast again?

I think the last time I did that I did have two breakfasts.

Oh, and about your siggy: if by the "God particle," you mean the Higgs boson, I believe it has mass.