The Intriguing Intersection of Free Will and Quantum Mechanics
Updated: Aug 25
Understanding Free Will and Its Implications
Eve and Adam, (Adam in Hebrew stands for Man) transgressed by consuming the forbidden fruit from the tree of knowledge. Because of their sin, the Almighty stripped them of their immortality and cast them out of the Garden of Eden in disgrace. Despite the penalties imposed on humanity, the Almighty left them with the gift of discernment, allowing them to differentiate and choose between right and wrong. This endowment of Free Will empowers humans to ponder the question of "what if" and to seek genuine answers to moral dilemmas, practical problems, discover, and innovate.
The Historical Debate on Free Will
Free Will has been debated for millennia by philosophers, religious leaders, and common people (in Hebrew, people split into two words that translate as children of Adam). The debate took an unexpected turn in the 20th century as leading physicists pulled Free Will into the middle of a heated discussion.
The discussions began with advancements in classical physics and a new branch of physics studying elementary particles called Quantum Mechanics. In 1930, the debate intensified and reached a climax in 1964 with the work of physicist John Bell.
John Bell's Theorem: A Game Changer
In 1985, Bell gave an interview to the BBC addressing his theorem. He stated:
“There is a way to escape the inference of superluminal speeds and spooky action at a distance (the term "spooky action at a distance" was coined by Einstein). But it involves absolute determinism in the Universe, the complete absence of free will. Suppose the world is super-deterministic, with not just inanimate nature running on behind-the-scenes clockwork, but with our behavior, including our belief that we are free to choose to do one experiment rather than another, absolutely predetermined. This includes the "decision" by the experimenter to carry out one set of measurements rather than another. The difficulty disappears. There is no need for a faster-than-light signal to tell particle A what measurement has been carried out on particle B because the universe, including particle A, already "knows" what that measurement and its outcome will be.”
Bell acknowledged that his description is a loophole around the difficulties super-determinism resolves all problems.
The Tension Between Quantum Mechanics and Classical Intuition
Bell's theorem doesn't directly "resolve" the speed-of-light limit as imposed by special relativity; instead, it exposes a fundamental tension between Quantum Mechanics (QM) and classical intuitions about locality and realism. Let me break this down step by step to address the problems and why super-determinism (the idea that the universe "knows" everything in advance because all events are predetermined or "frozen" into spacetime from the Big Bang) isn't the only escape—though it is one possible way out.
Recap of Bell's Theorem and the Core Issue
Bell's theorem (proven mathematically in 1964) shows that if the world obeys local realism—meaning particles have definite, pre-existing properties (realism) that are independent of measurement, and no influence travels faster than light (locality)—then certain statistical correlations in entangled particle experiments should satisfy "Bell inequalities."
However, QM predicts (and experiments confirm, starting with experiments in 1982 and many since) that these inequalities are violated. This means local realism can't explain the results.
The "speed-of-light problem" arises because entangled particles (e.g., two photons separated by light-years) show correlated outcomes instantly when measured, as if one "knows" the other's state right away. This looks like faster-than-light (FTL) influence, which relativity forbids for causal signals or information transfer.
The Choice Between Locality and Loopholes
Bell's proof doesn't fix the above; instead, it focuses us on a choice: Give up Locality & Realism or find a loophole that is compatible (satisfies Bell's theorem and makes Bell inequalities fail), i.e., a loophole like super-determinism.
Experiments continue to close loopholes (e.g., "freedom-of-choice" loopholes to rule out super-determinism by using distant quasars—truly random sources generating truly random sequences—to randomize measurements). However, super-determinism is hard to fully disprove because it's so all-encompassing. (No paradoxes, no confrontations) Let's hope that Free Will will stay with us!
The Current Understanding of Quantum Mechanics
Modern physics accepts that Quantum Mechanics works, and the "resolution" is that the Universe is weirder than classical physics: Correlations can be stronger than local causes allow, yet without breaking relativity's no-FTL-info rule. Bell's proof just quantifies that weirdness mathematically!
The Future of Quantum Mechanics and Free Will
Unless Quantum Mechanics is reconciled under an Unfired Theory, the weirdness will prevail. The implications of this ongoing debate extend beyond physics. They touch on philosophy, ethics, and our understanding of human agency.
As we continue to explore these profound questions, we must remain open to the possibilities that lie ahead. The interplay between Free Will and Quantum Mechanics may hold the key to understanding not just the universe, but our place within it.
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