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Quote by Marcus du Sautoy

“If, years later, I do use the slit detector to observe which way the electron went, it will mean that many years earlier the electron must have passed through one slit or the other. But if I don't use the "slit detector," then the electron must have passed through both slits. This is, of course, extremely weird. My actions at the beginning of the twenty-first century can change what happened thousands of years ago when the electron began its journey. It seems that just as there are multiple futures, there are also multiple pasts, and my acts of observation in the present can decide what happened in the past. As much as it challenges any hope of ever really knowing the future, quantum physics asks whether I can ever really know the past. It seems that the past is also in a superposition of possibilities that crystallize only once they are observed.”

Book:The Great Unknown: Seven Journeys to the Frontiers of Science

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The Great Unknown: Seven Journeys to the Frontiers of Science

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Author

Marcus du Sautoy

Marcus du Sautoy is a renowned British mathematician known for his work in group theory and geometry. Born on August 26, 1965, he currently holds the position of professor at the University of Oxford. Professor du Sautoy has also made significant contributions to mathematics education and outreach, authoring several popular mathematics books and participating in the production of several educational programs on mathematics. more

“More and more, I have no idea what I think of anything. It’s as if the world were this very strange beast under a big tarp. Writing is a way of poking at the tarp. You can watch what the beast does during the poking and maybe surmise something about the sort of beast it is, but you also don’t want to be too confident in your theories. I really like the fact that, these days, I can’t say what writing is for, what it’s supposed to do, or how it’s supposed to affect us. I just like doing it.”

Life Writing Books Opinions Weirdness Strangeness Oddness

Author:George Saunders

“So long as we don’t try to figure out which slit [electrons] go through, they will behave as if they go through both at once. But if we try to pin down which slit they pass through, they only go through one. The mere act of making the measurement – even if we can be pretty sure that the measurement shouldn’t obstruct or influence the electron’s path – appears to turn a wave into a particle. Yes, appears to. Does the electron really pass through both slits at once when we’re not looking at its path? Does it change from wave to particle when we do look? These are, according to Bohr’s view of quantum mechanics, illegitimate questions, precisely because they are insisting on some microscopic description underlying the measurements we make. Bohr argued that there is nothing in quantum mechanics that permits us to formulate such a description. That is not what the Schrödinger equation is about. It just predicts the outcomes of measurements.”

Physics Observation Measurement Quantum Mechanics Weirdness Experiment

Book:Beyond Weird

Source: Beyond Weird

“Quantum objects may in principle have a number of observable properties, but we can’t gather them all (Copenhagenists might in fact say ‘elicit them’) in a single go, because they can’t all exist at once. And by gathering some we may scramble the values of others.”

Observation Measurement Quantum Mechanics Weirdness Properties

Book:Beyond Weird

Source: Beyond Weird

“Weird people don't care if they're weird. They are the most entertaining to converse with because nothing is off-limits.”