In the early 90's a Professor proposed a theory for a "quantum Time machine" http://www.npl.washington.edu/AV/altvw45.html

The paper that referrs to has several citations from other papers, these (as well as the original) are probably worth reading for a better understanding.

 

http://scholar.google.com/scholar?hl=en&lr=&cites=17527387654273865876

ok,i read it,so his "time machine" won't work? also do quantum particle's travel back in time?

Edited December 5, 200817 yr by ps3

Told you this would happen

Told you this would happen

 

what are talking about?? this is different.

what are talking about?? this is different.

 

No, "do quantum particle's travel back in time" is something you've asked before, and has been addressed. If you want to discuss it further, you need to phrase a question which incorporates the information you have been given. Merely restating the question is insufficient and at some point becomes trolling.

here is where i got my info. http://www.colorado.edu/philosophy/vstenger/Briefs/QuantumTimeTravel.html http://www.colorado.edu/philosophy/vstenger/void.html

have these two links where the writer says that quantum particle's do in fact travel back in time,is this true? or i misread them? http://www.colorado.edu/philosophy/vstenger/Briefs/QuantumTimeTravel.html http://www.colorado.edu/philosophy/vstenger/void.html

have these two links where the writer says that quantum particle's do in fact travel back in time,is this true? or i misread them? http://www.colorado.edu/philosophy/vstenger/Briefs/QuantumTimeTravel.html http://www.colorado.edu/philosophy/vstenger/void.html

 

You can model them that way — they exhibit that behavior. I refer you to the link I gave in post #6. It'll tell you the same thing, because you're asking the same question.

 

How about asking a different (hopefully better) question?

You can model them that way — they exhibit that behavior. I refer you to the link I gave in post #6. It'll tell you the same thing, because you're asking the same question.

 

How about asking a different (hopefully better) question?

 

did you read the links i provided? what is it that the writer is talking about? because if these particles are able to do this,they would violate laws and causality and see weird paradoxes.

Nothing goes back in time. It's just a way of looking at the math, a model. It is not some experimental result.

Nothing goes back in time. It's just a way of looking at the math, a model. It is not some experimental result.

 

what is that stenger is talking about then?

Math. Ways of looking at things. A model.

have you heard of his model?

Well, I did reply to your post about it, didn't I?

how come he says they are not paradoxical?

Probably because what he's talking about is simply a result of the math... of our descriptions... of our models of the universe... not an actual phenomenon being observed or measured.

so not something actully physical or really happening in the universe?

Not that we've observed or measured, no. AFAIK, it's just the math right now. Just a model.

 

Once we've seen it happen or have empirical evidence confirming it, then we can start worrying about potential paradoxes and causality issues. But, for now, it's just a result of the math.

anything going back in time would be paradoxical right?

anything going back in time would be paradoxical right?

 

I don't know much about metaphysics. You posted in the physics forum, so I thought that's what we were discussing. Perhaps you should open a thread in the Speculations or General Discussion forum which asks that question.

anything going back in time would be paradoxical right?

 

Not in situations where you have time-reversal symmetry. As is the case with individual particles on the nuclear level.

i saw a video on youtube where a guy is trying to build a time machine. http://en.wikipedia.org/wiki/Ronald_Mallett swansont have you read the two links i provided?