The Leggett-Garg inequality is violated, so things are not realistic

[John Clark]

Reality says that a macroscopic object exists in one and only one state regardless of if it has been observed or not. In 1985 Anthony Leggett and Anupam Garg published an inequality that MUST be less than or equal to 1 if reality was true. It's similar to Bell's Inequality but Bell was about the relationship between two entangled particles, but Leggett-Garg is about if a microscopic object can be in more than one state at the same instant in time. 

In the June 24, 2024 issue of the journal Physical Review Letters, physicists tested the Leggett-Garg Inequality in an experiment with neutron beams, and they got a value of 1.20 +- 0.007. That is larger than 1. The Leggett-Garg inequality is violated. Reality is untrue.

Violation of a Leggett-Garg Inequality Using Ideal Negative Measurements in Neutron Interferometry

In their experiment they generated an intense neutron beam and then, using a perfect silicon crystal, they split it into two beams several centimeters apart. Then, using another crystal, the two beams are re-combine back in the one beam and then hit the detector. Each beam is made up of many millions of neutrons and thus is huge by quantum standards, and there are two ways the neutrons can travel from the source to the detector.  

The lead researcher says "The idea that maybe the neutron is only traveling on one of the two paths, we just don’t know which one” has thus been refuted." Mathematically there is simply no way the behavior of those neutrons can be explained by any conceivable macroscopically realistic theory. 

Incidentally, Many Worlds is NOT a realistic theory. 

John K Clark    See what's on my new list at  Extropolis

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