Feb 2, 2023 06:50 PM
https://bigthink.com/13-8/quantum-entang...-variable/
EXCERPTS: . . . Quantum entanglement is an unquestionable feature of quantum physics. It seems to defy space, for it is independent of the distance between objects, and time, for if it is not instantaneous — it is at least faster than light.
Could physicists be missing something important and obvious? [...] Are there what we could call hidden variables, not part of the traditional formulation of quantum mechanics, that could explain this? In the early 1950s, physicist David Bohm added an extra level of explanation to quantum theory, one capable of describing the electron’s position with certainty. He called it the pilot wave function....
[...] The pilot wave acted everywhere at once, like an omnipresent deity, exercising a property physicists call nonlocality. In the new, de Broglie-Bohm mechanics, particles remained particles, and their collective motion was guided deterministically through the nonlocal action of the pilot wave. The particles were like a group of surfers gliding along a single wave, each pushed this way or that as the omnipresent wave advanced.
The hidden variable would be the missing link between a classical concept of reality and the fuzzy world of quantum indeterminacy...
[...] The uptake is that over the past four decades, Bell’s test has been implemented in real experiments — which were awarded the 2022 Nobel Prize in physics — and the results were truly shocking: There are no local hidden variable theories compatible with quantum mechanics.
In other words, nature does seem to work through spooky actions-at-a-distance. Nonlocal influences acting superluminally between members of spatially separated entangled quantum pairs — these are ghosts that seem to be real. Reality is not only stranger than we suppose. It is far stranger than we can suppose... (MORE - details)
EXCERPTS: . . . Quantum entanglement is an unquestionable feature of quantum physics. It seems to defy space, for it is independent of the distance between objects, and time, for if it is not instantaneous — it is at least faster than light.
Could physicists be missing something important and obvious? [...] Are there what we could call hidden variables, not part of the traditional formulation of quantum mechanics, that could explain this? In the early 1950s, physicist David Bohm added an extra level of explanation to quantum theory, one capable of describing the electron’s position with certainty. He called it the pilot wave function....
[...] The pilot wave acted everywhere at once, like an omnipresent deity, exercising a property physicists call nonlocality. In the new, de Broglie-Bohm mechanics, particles remained particles, and their collective motion was guided deterministically through the nonlocal action of the pilot wave. The particles were like a group of surfers gliding along a single wave, each pushed this way or that as the omnipresent wave advanced.
The hidden variable would be the missing link between a classical concept of reality and the fuzzy world of quantum indeterminacy...
[...] The uptake is that over the past four decades, Bell’s test has been implemented in real experiments — which were awarded the 2022 Nobel Prize in physics — and the results were truly shocking: There are no local hidden variable theories compatible with quantum mechanics.
In other words, nature does seem to work through spooky actions-at-a-distance. Nonlocal influences acting superluminally between members of spatially separated entangled quantum pairs — these are ghosts that seem to be real. Reality is not only stranger than we suppose. It is far stranger than we can suppose... (MORE - details)