A noise inequality for classical forces

Understand

Lorentz invariance requires local interactions, with force laws such as the Coulomb interaction arising via virtual exchange of force carriers such as photons.

• Many have considered the possibility that, at long distances or large mass scales, this process changes in some way to lead to classical behavior.
• Here we hypothesize that classical behavior could be due to an inability of some force carriers to convey entanglement, a characteristic measure of nonlocal, quantum behavior.
• We then prove that there exists a local test that allows one to verify entanglement generation, falsifying our hypothesis.