QM of particles with no common past light cone

[ueit]

When discussing EPR experiments on this forum I made the claim that Bell's theorem does not prove classical determinism false because there is always the possibility that the correlations between distant measurements can be a result of the common past shared by particle source and the two detectors.

A counterargument to this "loophole" is that one can use microwave photons from a period close to big-bang, to chose the detector orientation, and those particles do not necessary have a common past.

Now, my question is as follows:

If two particles are created at the big-bang in such a way that no light signal could travel between them, does QM, as we know it, still apply? For example, I would expect that two charged particles in that situation would not experience Coulombian force, therefore the potential used to calculate the Hamiltonian necessary for the derivation of Schrodinger's equation would be different than for a "normal" pair of particles.

Thanks.

 

[ueit]

Anybody There?

 

[denian]

I can provide a response to this content by saying that the question of whether QM still applies in a scenario where two particles have no common past light cone is a topic of ongoing research and debate in the scientific community. While the concept of a common past light cone is important for understanding the correlations between distant measurements in EPR experiments, it is not the only factor at play in determining the behavior of particles at the quantum level.

The use of microwave photons from a period close to the big bang to choose detector orientation is an interesting proposal that challenges the idea of a common past for particles. However, it is important to note that this is still a theoretical concept and has not yet been experimentally tested. Therefore, it is premature to draw conclusions about the applicability of QM in this scenario.

Regarding the specific example of two charged particles created at the big bang, it is true that the potential used to calculate the Hamiltonian necessary for the derivation of Schrodinger's equation may be different than for a "normal" pair of particles. However, this does not necessarily mean that QM does not apply. In fact, the principles of QM, such as superposition and entanglement, have been successfully applied to a wide range of physical systems, including those involving charged particles.

In conclusion, the question of whether QM still applies in a scenario where two particles have no common past light cone is a complex and ongoing topic of research. While there may be challenges to the traditional understanding of this concept, it is important to continue studying and testing these ideas in order to gain a deeper understanding of the fundamental principles of quantum mechanics.