No, looking at the Scientific American article from it (and I spent as little as time reading that as possible) here's what is happening. (Anyone with a good grade in QM will understand what is being said here.)
The experiment has two possibilities: A or B. If A, then you see X. If B, then you should see Y and then Z.
They noticed that Y and Z are occurring before and after each other. It looks like time is reversed!
But that's not what happens in the quantum world.
In the quantum world, BOTH A and B happen. When you measure Y or Z, then you expect to see the other value two, but it is the measurement itself which CAUSES the "decision" between A and B.
When you consider the total quantum state of BOTH A and B happening, and consider how Y and Z are measured, and realize that Z and X are similar events, then everything makes sense.
It's just quantum stuff being quantum. The quantum world doesn't work like the world we are familiar with. Everything happens all the time. Stuff doesn't appear until you look at it, and then that causes only one of the universe of possibilities to appear. The observation is part of the experiment, in short.
It's not too surprising, just weird. Like some chemical reaction that makes a pretty color.
https://www.scientificamerican.com/article/evidence-of-negative-time-found-in-quantum-physics-experiment/
The experiment has two possibilities: A or B. If A, then you see X. If B, then you should see Y and then Z.
They noticed that Y and Z are occurring before and after each other. It looks like time is reversed!
But that's not what happens in the quantum world.
In the quantum world, BOTH A and B happen. When you measure Y or Z, then you expect to see the other value two, but it is the measurement itself which CAUSES the "decision" between A and B.
When you consider the total quantum state of BOTH A and B happening, and consider how Y and Z are measured, and realize that Z and X are similar events, then everything makes sense.
It's just quantum stuff being quantum. The quantum world doesn't work like the world we are familiar with. Everything happens all the time. Stuff doesn't appear until you look at it, and then that causes only one of the universe of possibilities to appear. The observation is part of the experiment, in short.
It's not too surprising, just weird. Like some chemical reaction that makes a pretty color.