#298 Negative time or redshift?
Louis, are these people colleagues of yours?
https://arxiv.org/pdf/2409.03680 https://arxiv.org/pdf/2310.00432
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Louis, are these people colleagues of yours?
https://arxiv.org/pdf/2409.03680 https://arxiv.org/pdf/2310.00432
Here’s an easily accessible video by Anton Petrov on the paper:
https://www.youtube.com/watch?v=_ih1Ofn8k1s
Hi Mike, Actually that is where I found the article. Interesting fact: Petrov did a degree at McGill and worked as a researcher in astrobiology under Hojatollah Vali, who founded the program. Back in the 1990s I helped organize a conference with Vali and a few others and I used to visit Vali occasionally in the 2000s. However, I don’t recall ever seeing Petrov. Smallish world! Roy
On Sat, 4 Jan 2025 at 01:10, mikehelland @.***> wrote:
Hi Roy @genotics I know Aephraim Steinberg, he’s at U. of T. Years ago, he was measuring negative time delays (or faster than light) tunneling… and his web page is fun. I guess now he’s using group delay to show the weird effects that arise when one takes the “photon” picture too literally (e.g. @sahil5d’s description of light).
This kind of thing is good for the graduate students listed as authors. I did a similar experiment 25 years ago in the third lab down the hall from Steinberg’s lab. We got a 3 ns “negative time offset” before the main pulse. (This was following work on delayed pulses done ten years before.)
Steinberg et al. do a more difficult measurement (see section about systematic effects) and get 30 ns, so they beat us by a factor of ten and the data still fits theory. Good for them!
There is a well understood AC-Stark shift, but no redshift compatible with the cosmological redshift. That’s the same old, same old, same old, same old, same old, same old stuff. 😞 🥱
Although this is good material for graduate students in experimental physics, there is no new physics to be learned from it.
Hi Louis, I think you ought to post your response (the physics parts) to the comments on Petrov’s commentary. He does appear to have a substantial following, and any exposure there might lure a few critical minds into our net. Cheers, Roy
On Sat, 4 Jan 2025 at 17:40, Louis Marmet @.***> wrote:
Petrov has done a good job explaining the physics. My plate is already full with cosmology, I have to choose my battles…