From a PBS Nova special titled, "Time Travel"...
NARRATOR: The leader in this field, Raymond Chiao, has misgivings about Nimtz's interpretations, but even he agrees with part of what Nimtz is saying.
PROF. RAYMOND CHIAO (University of California): In our experiments we have measured that a single photon can tunnel across a tunnel barrier at 1.7 times the speed of light.
NARRATOR: Chiao agrees that quantum mechanical tunnelling allows occasional random photons to break the light speed limit. What upsets him, and the rest of the physics world, is that Nimtz claims to have used it to send information faster than light. That really is taboo.
RAYMOND CHIAO: To have a genuine signal you really have to control the signal, but in, in quantum mechanical tunnelling it's a completely random process. Fundamentally we cannot, we cannot send information with this tunnelling particle.
GUENTER NIMTZ: Yeah, some colleagues are claiming that you cannot send information and then we started to transmit Mozart 40 and this is for instance the original tape. That's what we sent at a speed of 4.7 times the velocity of light and a distance of about 14 centimetre. Whether you can recognize Mozart 40 or not...
NARRATOR: Despite the random nature of the process, Mozart seems to have got through.
RAYMOND CHIAO: The essential question is: what is a signal, or what constitutes information? Has he really sent a signal in the sense of information faster than the speed of light? This is where Professor Nimtz and I part company because we don't really have a rigorous definition of what is information at the quantum level.
GUENTER NIMTZ: Maybe that this is not information for American colleague, but for a German or a British colleague. I think Mozart 40 has some information in it.
NARRATOR: Whilst well established in his own field, Nimtz is new to tunnelling and claiming to send Mozart faster than light has brought him perilously close to being called crackpot. His critics cite signal fronts and carrier waves. He counters with a limited bandwidth, but so far he stands alone.
Right or wrong, this leads to an interesting thought experiment, a gerdanken experiment in German. What if you could tunnel a message to the other side of the universe? Going faster than light, the message would
seem to go backwards in time.
Cut, copy, paste, skip ahead, re-read, print and fold.
Like fish in a fish bowl, we are hardly aware of it.
Matter has mass, software doesn't. How much does consciousness weigh?