Author Topic: Quantum Mirrors  (Read 666 times)

Sriram

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Quantum Mirrors
« on: October 04, 2021, 06:55:13 AM »
Hi everyone,

Here is the idea of 'relational' worldview....which is believed to have inspired Einstein.

https://scitechdaily.com/is-reality-a-game-of-quantum-mirrors-a-new-theory-helps-explain-schrodingers-cat/

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Expecting objects to have their own independent existence – independent of us, and any other objects – is actually a deep-seated assumption we make about the world. This assumption has its origin in the scientific revolution of the 17th century, and is part of what we call the mechanistic worldview. According to this view, the world is like a giant clockwork machine whose parts are governed by set laws of motion.

But as Italian physicist Carlo Rovelli argues in his new book Helgoland, quantum theory – the physical theory that describes the universe at the smallest scales – almost certainly shows this worldview to be false. Instead, Rovelli argues we should adopt a “relational” worldview.

During the scientific revolution, the English physics pioneer Isaac Newton and his German counterpart Gottfried Leibniz disagreed on the nature of space and time.

Leibniz,....... claimed that space and time were nothing more than the sum total of distances and durations between all the objects and events of the world. If we removed the contents of the universe, we would remove space and time also. This is the “relational” view of space and time: they are only the spatial and temporal relations between objects and events. The relational view of space and time was a key inspiration for Einstein when he developed general relativity.

According to orthodox quantum theory, the cat is neither dead nor alive until we open the box and observe the system. A puzzle remains concerning what it would be like for the cat, exactly, to be neither dead nor alive.

But according to the relational interpretation, the state of any system is always in relation to some other system. So the quantum process in the box might have an indefinite outcome in relation to us, but have a definite outcome for the cat.

So it is perfectly reasonable for the cat to be neither dead nor alive for us, and at the same time to be definitely dead or alive itself. One fact of the matter is real for us, and one fact of the matter is real for the cat. When we open the box, the state of the cat becomes definite for us, but the cat was never in an indefinite state for itself.

On this view, the world is an intricate web of interrelations, such that objects no longer have their own individual existence independent from other objects – like an endless game of quantum mirrors. Moreover, there may well be no independent “metaphysical” substance constituting our reality that underlies this web.

“We are nothing but images of images. Reality, including ourselves, is nothing but a thin and fragile veil, beyond which … there is nothing.”

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Cheers.

Sriram

Udayana

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Re: Quantum Mirrors
« Reply #1 on: October 04, 2021, 03:28:09 PM »
It is an interpretation of known physics, but I'm not sure that it adds much insight.

Rovelli does usually write well and explains the physics clearly for non-mathematicians. Here is a review from the Guardian:

https://www.theguardian.com/books/2021/mar/23/helgoland-by-carlo-rovelli-review-the-mysteries-of-quantum-mechanics

Ah, but I was so much older then ... I'm younger than that now

Udayana

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Ah, but I was so much older then ... I'm younger than that now