Entanglement is certainly one of the most out there and interesting observations in quantum mechanics.
I have written here about it in more detail before, but just briefly: In the basic experiment, if two particles are born together, say a particle goes through a crystal and is “broken” into two each with half the energy of the first, they are entangled. Not because they share inherent properties, which to some degree they do (like the amount of energy that must be conserved), but because they are entangled. When you measure one of the quantum properties that measurement result can vary within those results that are allowed according to quantum laws (say magnetic spin or polarization) in that one particle, and the corresponding property the in the other, sister particle is immediately determined. Anywhere in space, instantaneously, not obeying the speed of light limit (and some experiments, called delayed choice, even suggest a time component i.e. it is determined before you did the measurement, which is even more mind boggling!!)
Many think this suggests Mind plays a role, or is evidence we are all one, non-duality. It certainly does suggest that, but it is all so inconceivable, so beyond what I can grasp with my brain (and I am not alone; the great physicist Feynman famously said, and I paraphrase, you can’t understand this), I shy away from interpretations because it is so beyond intellectual thought for me it is like a deep koan and I keep my conclusions to:
Whatever you think, based on your 4-d (space and time) experience and scale of sense perceptions is true is wrong in some basic and ultimate way. The universe, Truth, is deeper and more omnipresent than your brain functions.
I do think the deepest view, to the degree views can approach Truth, is Mind and non-duality as the core of Truth, and sure entanglement is about non-locality in space and time and so is consistent with that (as we say in medicine and science), but I admit after all these years still I balk a bit where others I respect, those I have suggested you look into in these blogs, do not fear to tread. I just know we don’t really understand quantum mechanics so I wont bet my Mind on it, as we measure it it in our experiments.
And it certainly doesn’t mean whatever fantasy you have about non-locality and its implications is right, of course. Good luck on jumping off a roof and trying to manifest a soft landing by thinking quantum states of the ground. As Bob Lanza said, there is cause and effect. You have karma. Don’t get arrogant and indulgent. Is your little brain in that itty-bitty boney box really that pure and powerful? Be careful about confusing your brain with Mind, non-Duality as meaning your ego, your perspective and delusions, your hopes and fears, is the universe. After all, that’s wisdom, that’s spiritual practice, not aggrandizing the ego with uber-spirituality and just adding more delusion by interpreting the truth through what you’d like to believe. (It’s also science. Ha did the science spirituality thing again!)
One scientific criticism has been that this is limited to single of a few particles or atoms. Well, now it has been none at the level you can see with a magnifying glass or certainly a $50 toy microscope, the level of small cells (i.e. life). Look up:
The criticism to extrapolating to your day to day life is that is was done near –273 degrees centigrade, absolute zero where all but the most basic quantum effects determined by Heisenberg’s uncertainly principle stop (cant stop completely; that is very deep and Buddhist also; can’t stop change), about 3 degrees colder than the universe in deep space.
Well, quantum effects have been seen in warm wet living beings, they may just be harder to demonstrate.
Remember, the ancients, our spiritual and philosophical ancestors, came to this without quantum mechanics! And practice (and science!) is about authenticity I think, not proving some a priori claim however cool and whether I agree with it.
But even if it doesn’t mean you are likely to (or should feel a delusional need to) try to quantum change the ground if you challenge time and space by jumping off a roof, or that it PROOVES we are all one, Mind and non-duality and all that, at least, at a minimum, we can revel in the deep mystery, the underlying unity it suggests beyond our concepts and experience.