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SeventhSigma
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Yes, there are some nonlocal deterministic QM theories that do not violate the speed of light. One example is the pilot-wave theory, also known as the de Broglie-Bohm theory, which proposes that particles have definite positions and velocities at all times, but are guided by a wave function that is nonlocal.
Nonlocal deterministic QM theories explain the apparent violation of the speed of light in entanglement experiments by proposing that particles are connected by an underlying nonlocal field or pilot-wave that allows them to communicate instantaneously, regardless of distance.
Yes, nonlocal deterministic QM theories do contradict Einstein's theory of relativity, which states that no information can travel faster than the speed of light. However, some physicists argue that this contradiction can be resolved by reinterpreting the concept of locality in quantum mechanics.
Yes, nonlocal deterministic QM theories can be tested experimentally. One proposed experiment involves a setup known as the "delayed-choice quantum eraser," which aims to test whether particles are affected by future events, as predicted by some nonlocal deterministic theories.
The implications of nonlocal deterministic QM theories for our understanding of the universe are still being debated. Some believe that these theories could potentially resolve long-standing issues in quantum mechanics, while others argue that they may require a complete overhaul of our current understanding of reality.