Woke up yesterday morning and it hit me that I had spent the previous evening discussing theories of anti-gravity on my podcast. I was hit with a wave of morning-after awkwardness, then, as I lay in the dark, I built up in my mind that it was not such a stupid thing to have done after all. This is a daily cycle for me, and not just with physics but with just about any idea I have, or any project I am pursuing.
Wednesday night's broadcast was either among my best or perhaps my worst. I know much of my audience probably tuned it out. I had slides but I never showed them. I just talked, trying to give them my opinion of the research, and injecting my own insights based on my own experiences. I told them how shocked I was that anti-gravity was a thing, and that it was a popular topic even discussed by Joe Rogan. I told them I was a Rip Van Winkle physicist waking up to find this bizarre fringe topic, about which I knew nothing about, had consumed the imagination of a large amount of people online. Surely it was all due to the Internet and social media, where fringe speculative physics has lapped the progress of accepted mainstream science, and now people don't trust mainstream science at all. I was so out of date!
But c'mon, is it REAL????????
Writing science fiction can be fun, but that is not my role. I want to know, and now, God help me, I want to believe.*
Are we entering a Golden Age or an Age of Decline (or both depending on how you look at it)? My audience on Wednesday had brought up "Golden Age" in the chat, and also, at the same, somewhat paradoxically "getting back to normal." Normal of course is hard to pin down. In some way, normal for me would be 1969.
I told them that for me discussing the possibly validity of a claim made by a scientific researcher in a U.S. government laboratory that they had successfully reduced the force of gravity on an object by up to 2%, and that a similar claim was made by a Russian emigre physicist in Finland is exactly how normal is supposed to operate.
Normal physics, I told them, is that by experiment we discover new phenomena which have no explanation, and that by investigating and explaining them we advance theory but also provide practical usages for humanity in the form of new technology.
This has not been happening in a long time, I told them. It has begun to feel like we will never again discover novel phenomena in nature that has practical use, like anti-gravity would. We have gotten very good at confirming predictions made a long time ago by theoretical insight. When I was in graduate school in the 1990s, this is what everything was about. People pushed the technology of short laser pulses to isolate atoms, all of it based on old theory. The biggest one was the development of new technologies in low temperature physics, which finally allowed people to explore things in the laboratory that had never been possible. The canonical example is probably the production (at last) of a phenomenon called a Bose-Einstein condensate at the University of Colorado in 1995. The condensate itself is just ordinary rubidium atoms. The key is being able to cool them down to near absolute zero, and that point a bunch of strange quantum effects start to kick in.
Another strange quantum phenomena that normally arises only with very low temperatures is superconductivity, if you have ever heard that term. Superconductivity is much easier to achieve that Bose-Einstein condensates because you don't have to make it so impossibility cold, only normal supercold like liquid nitrogen. It was actually discovered as a new and unexplainable phenomenon in 1911! It was until the late 1950s that we had a (quantum) theory of why superconductivity arises in certain materials and at certain low temperatures. Since then the struggle has mostly been one of applied science. How can we achieve this effect without it having to be so cold in the lab? Can we see it a room temperature?
So that's what I mean by normal---physics happening like it did in 1911.
The weird part for me is how the anti-gravity lab experiments I mention were being done in the 1990s while I was in graduate school. They were being published in the normal journals (which I didn't read, but many others did). No one was talking about this. They were talking about Bose-Einstein condensates. They were talking about high-temperature superconductivity. They were talking about nonlinear dynamics and chaos, which is what I wound up doing with my advisor.
They were not talking about anti-gravity, and this past week is the first time I heard of these papers from the 1990s. Some of the most formative papers were published in 1991 and 1992, right when I was the most embedded among other physicists who talked about the latest trends. Then the research, at least in the original U.S. lab, stopped apparently after 1999 and the main researcher dropped out of sight after 2003 until it was reported in 2021 that she died. This has led to a lot of conspiracy theories upon which one can only speculate.
But it is certainly true to me at least that in retrospect this topic never landed on a plate in front of me during those years.
It gets even better because one of the early names in speculative anti-gravity in the mid 1950s, who even today citied in Wikipedia, was someone I know and worked with, and talked with, at the University of Texas.