Send Particle Backwards in Time - Is this a hoax?

[hodges]

Found this on Youtube. Sounds pretty far-fetched to me, but given that it was supposedly broadcast on the Discovery Channel I watched it. The idea is to be able to distort space and time with laser beams, such that a particle can be sent from the future back to the past. Supposedly it is already being actively worked on.

I'm guessing that either 1. the theory itself is invalid, or 2. it would require infinite amounts of energy to actually do this. Any comments from those more knowledgeable on the subject than I am?

Thanks,
Hodges

 

[atyy]

Mallett's Foundations of Physics paper doesn't seem to be on arXiv, but 2 papers commenting on it are:
http://arxiv.org/abs/gr-qc/0410078
http://arxiv.org/abs/gr-qc/0701024

 

[hodges]

Mallett's Foundations of Physics paper doesn't seem to be on arXiv, but 2 papers commenting on it are:
http://arxiv.org/abs/gr-qc/0410078
http://arxiv.org/abs/gr-qc/0701024

Thanks for the links. Am I understanding correctly that the first link repudiates what the video describes being attempted? What is the second link? Is it trying to show that the original process using light does not work by arguing that the claimed effects do not even need light?

Hodges